Statistical data set
MOT class 5 vehicles: initial failures by defect category
Updated 28 March 2024
Download CSV 41.4 KB
| Financial year | Period | Defect category | Overall % of tests | Overall % of defects | Dangerous defects % of tests | Dangerous defects % of defects | Major defects % of tests | Major defects % of defects |
|---|---|---|---|---|---|---|---|---|
| 2023 to 2024 | Quarter 3: October to December | Body, chassis, structure | 4.34% | 9.32% | 0.73% | 7.07% | 3.83% | 9.69% |
| 2023 to 2024 | Quarter 3: October to December | Brakes | 9.69% | 23.15% | 2.33% | 25.46% | 8.65% | 22.77% |
| 2023 to 2024 | Quarter 3: October to December | Buses and coaches supplementary tests | 1.40% | 2.22% | 0.11% | 1.06% | 1.32% | 2.41% |
| 2023 to 2024 | Quarter 3: October to December | Identification of the vehicle | 0.30% | 0.49% | Not set | Not set | 0.30% | 0.57% |
| 2023 to 2024 | Quarter 3: October to December | Lamps, reflectors and electrical equipment | 10.38% | 22.31% | 0.29% | 2.74% | 10.23% | 25.53% |
| 2023 to 2024 | Quarter 3: October to December | Noise, emissions and leaks | 3.30% | 4.50% | 0.08% | 0.71% | 3.23% | 5.12% |
| 2023 to 2024 | Quarter 3: October to December | Road Wheels | 0.08% | 0.11% | 0.02% | 0.27% | 0.06% | 0.09% |
| 2023 to 2024 | Quarter 3: October to December | Seat belt installation check | 0.11% | 0.17% | Not set | Not set | 0.11% | 0.20% |
| 2023 to 2024 | Quarter 3: October to December | Seat belts and supplementary restraint systems | 3.88% | 6.85% | 0.18% | 1.59% | 3.76% | 7.71% |
| 2023 to 2024 | Quarter 3: October to December | Speedometer and speed limiter | 0.29% | 0.37% | Not set | Not set | 0.29% | 0.44% |
| 2023 to 2024 | Quarter 3: October to December | Steering | 1.48% | 2.29% | 0.12% | 1.15% | 1.40% | 2.47% |
| 2023 to 2024 | Quarter 3: October to December | Suspension | 5.97% | 12.94% | 0.60% | 6.63% | 5.57% | 13.98% |
| 2023 to 2024 | Quarter 3: October to December | Tyres | 4.69% | 9.31% | 3.72% | 53.23% | 1.17% | 2.08% |
| 2023 to 2024 | Quarter 3: October to December | Visibility | 3.69% | 5.97% | 0.01% | 0.09% | 3.68% | 6.94% |
| 2023 to 2024 | Quarter 3: October to December | Overall initial failure rate | 26.49% | Not set | 7.32% | Not set | 19.16% | Not set |
| 2023 to 2024 | Quarter 3: October to December | Average defects per initial test failure | Not set | 2.97 | Not set | 0.42 | Not set | 2.55 |
| 2023 to 2024 | Quarter 2: July to September | Body, chassis, structure | 4.46% | 9.46% | 0.78% | 9.47% | 3.91% | 9.46% |
| 2023 to 2024 | Quarter 2: July to September | Brakes | 10.04% | 23.24% | 2.29% | 27.31% | 9.06% | 22.62% |
| 2023 to 2024 | Quarter 2: July to September | Buses and coaches supplementary tests | 1.53% | 2.41% | 0.08% | 0.80% | 1.45% | 2.65% |
| 2023 to 2024 | Quarter 2: July to September | Identification of the vehicle | 0.32% | 0.48% | Not set | Not set | 0.32% | 0.55% |
| 2023 to 2024 | Quarter 2: July to September | Lamps, reflectors and electrical equipment | 10.64% | 21.87% | 0.17% | 1.59% | 10.56% | 24.97% |
| 2023 to 2024 | Quarter 2: July to September | Noise, emissions and leaks | 3.40% | 4.69% | 0.09% | 0.88% | 3.35% | 5.27% |
| 2023 to 2024 | Quarter 2: July to September | Road Wheels | 0.05% | 0.06% | 0.02% | 0.24% | 0.02% | 0.04% |
| 2023 to 2024 | Quarter 2: July to September | Seat belt installation check | 0.06% | 0.17% | Not set | Not set | 0.06% | 0.19% |
| 2023 to 2024 | Quarter 2: July to September | Seat belts and supplementary restraint systems | 3.59% | 7.34% | 0.23% | 2.95% | 3.44% | 8.01% |
| 2023 to 2024 | Quarter 2: July to September | Speedometer and speed limiter | 0.32% | 0.43% | Not set | Not set | 0.32% | 0.50% |
| 2023 to 2024 | Quarter 2: July to September | Steering | 1.62% | 2.53% | 0.08% | 0.80% | 1.58% | 2.80% |
| 2023 to 2024 | Quarter 2: July to September | Suspension | 5.82% | 12.92% | 0.54% | 6.05% | 5.44% | 13.97% |
| 2023 to 2024 | Quarter 2: July to September | Tyres | 4.13% | 8.14% | 3.34% | 49.60% | 1.00% | 1.80% |
| 2023 to 2024 | Quarter 2: July to September | Visibility | 3.91% | 6.25% | 0.03% | 0.32% | 3.89% | 7.16% |
| 2023 to 2024 | Quarter 2: July to September | Overall initial failure rate | 26.96% | Not set | 7.02% | Not set | 19.95% | Not set |
| 2023 to 2024 | Quarter 2: July to September | Average defects per initial test failure | Not set | 2.91 | Not set | 0.39 | Not set | 2.53 |
| 2023 to 2024 | Quarter 1: April to June | Body, chassis, structure | 5.26% | 10.69% | 0.89% | 10.58% | 4.63% | 10.71% |
| 2023 to 2024 | Quarter 1: April to June | Brakes | 10.12% | 22.15% | 2.10% | 23.72% | 9.36% | 21.90% |
| 2023 to 2024 | Quarter 1: April to June | Buses and coaches supplementary tests | 1.40% | 2.06% | 0.09% | 0.91% | 1.32% | 2.24% |
| 2023 to 2024 | Quarter 1: April to June | Identification of the vehicle | 0.31% | 0.44% | Not set | Not set | 0.31% | 0.51% |
| 2023 to 2024 | Quarter 1: April to June | Lamps, reflectors and electrical equipment | 11.27% | 22.06% | 0.20% | 1.73% | 11.16% | 25.22% |
| 2023 to 2024 | Quarter 1: April to June | Noise, emissions and leaks | 3.20% | 3.91% | 0.08% | 0.64% | 3.13% | 4.42% |
| 2023 to 2024 | Quarter 1: April to June | Road Wheels | 0.05% | 0.06% | 0.01% | 0.09% | 0.04% | 0.06% |
| 2023 to 2024 | Quarter 1: April to June | Seat belt installation check | 0.06% | 0.09% | Not set | Not set | 0.06% | 0.10% |
| 2023 to 2024 | Quarter 1: April to June | Seat belts and supplementary restraint systems | 4.07% | 7.62% | 0.23% | 3.47% | 3.95% | 8.26% |
| 2023 to 2024 | Quarter 1: April to June | Speedometer and speed limiter | 0.37% | 0.43% | Not set | Not set | 0.37% | 0.50% |
| 2023 to 2024 | Quarter 1: April to June | Steering | 1.67% | 2.39% | 0.11% | 1.00% | 1.60% | 2.61% |
| 2023 to 2024 | Quarter 1: April to June | Suspension | 6.01% | 12.07% | 0.66% | 6.75% | 5.59% | 12.89% |
| 2023 to 2024 | Quarter 1: April to June | Tyres | 4.82% | 8.61% | 3.92% | 51.09% | 1.14% | 2.01% |
| 2023 to 2024 | Quarter 1: April to June | Visibility | 5.06% | 7.42% | Not set | Not set | 5.06% | 8.57% |
| 2023 to 2024 | Quarter 1: April to June | Overall initial failure rate | 27.37% | Not set | 7.31% | Not set | 20.06% | Not set |
| 2023 to 2024 | Quarter 1: April to June | Average defects per initial test failure | Not set | 3.21 | Not set | 0.43 | Not set | 2.78 |
| 2022 to 2023 | Total | Body, chassis, structure | 4.70% | 10.21% | 0.82% | 9.40% | 4.12% | 10.34% |
| 2022 to 2023 | Total | Brakes | 9.34% | 22.28% | 2.11% | 25.19% | 8.45% | 21.82% |
| 2022 to 2023 | Total | Buses and coaches supplementary tests | 1.26% | 1.95% | 0.06% | 0.57% | 1.21% | 2.17% |
| 2022 to 2023 | Total | Identification of the vehicle | 0.18% | 0.27% | Not set | Not set | 0.18% | 0.32% |
| 2022 to 2023 | Total | Lamps, reflectors and electrical equipment | 10.56% | 22.87% | 0.23% | 2.23% | 10.46% | 26.16% |
| 2022 to 2023 | Total | Noise, emissions and leaks | 3.16% | 4.33% | 0.10% | 0.91% | 3.11% | 4.87% |
| 2022 to 2023 | Total | Road Wheels | 0.08% | 0.11% | 0.01% | 0.09% | 0.07% | 0.11% |
| 2022 to 2023 | Total | Seat belt installation check | 0.05% | 0.07% | Not set | Not set | 0.05% | 0.08% |
| 2022 to 2023 | Total | Seat belts and supplementary restraint systems | 3.58% | 7.07% | 0.19% | 2.14% | 3.44% | 7.85% |
| 2022 to 2023 | Total | Speedometer and speed limiter | 0.29% | 0.37% | Not set | Not set | 0.29% | 0.43% |
| 2022 to 2023 | Total | Steering | 1.45% | 2.14% | 0.08% | 0.75% | 1.38% | 2.36% |
| 2022 to 2023 | Total | Suspension | 5.67% | 12.29% | 0.63% | 7.15% | 5.26% | 13.11% |
| 2022 to 2023 | Total | Tyres | 4.48% | 8.87% | 3.54% | 51.39% | 1.13% | 2.08% |
| 2022 to 2023 | Total | Visibility | 4.51% | 7.17% | 0.02% | 0.18% | 4.50% | 8.29% |
| 2022 to 2023 | Total | Overall initial failure rate | 25.98% | Not set | 6.87% | Not set | 19.11% | Not set |
| 2022 to 2023 | Total | Average defects per initial test failure | Not set | 3.01 | Not set | 0.41 | Not set | 2.6 |
| 2022 to 2023 | Quarter 4: January to March | Body, chassis, structure | 4.90% | 10.14% | 0.95% | 10.81% | 4.19% | 10.03% |
| 2022 to 2023 | Quarter 4: January to March | Brakes | 9.45% | 22.62% | 2.23% | 25.43% | 8.54% | 22.16% |
| 2022 to 2023 | Quarter 4: January to March | Buses and coaches supplementary tests | 1.23% | 1.98% | 0.04% | 0.35% | 1.20% | 2.25% |
| 2022 to 2023 | Quarter 4: January to March | Identification of the vehicle | 0.19% | 0.26% | Not set | Not set | 0.19% | 0.31% |
| 2022 to 2023 | Quarter 4: January to March | Lamps, reflectors and electrical equipment | 10.29% | 22.39% | 0.27% | 2.85% | 10.17% | 25.54% |
| 2022 to 2023 | Quarter 4: January to March | Noise, emissions and leaks | 3.57% | 4.91% | 0.08% | 0.69% | 3.53% | 5.59% |
| 2022 to 2023 | Quarter 4: January to March | Road Wheels | 0.08% | 0.11% | 0.01% | 0.09% | 0.08% | 0.11% |
| 2022 to 2023 | Quarter 4: January to March | Seat belt installation check | 0.08% | 0.11% | Not set | Not set | 0.08% | 0.13% |
| 2022 to 2023 | Quarter 4: January to March | Seat belts and supplementary restraint systems | 3.76% | 7.37% | 0.17% | 1.82% | 3.62% | 8.27% |
| 2022 to 2023 | Quarter 4: January to March | Speedometer and speed limiter | 0.25% | 0.34% | Not set | Not set | 0.25% | 0.39% |
| 2022 to 2023 | Quarter 4: January to March | Steering | 1.55% | 2.34% | 0.08% | 0.78% | 1.47% | 2.60% |
| 2022 to 2023 | Quarter 4: January to March | Suspension | 5.47% | 12.00% | 0.65% | 7.18% | 5.08% | 12.78% |
| 2022 to 2023 | Quarter 4: January to March | Tyres | 4.55% | 8.66% | 3.65% | 50.00% | 1.10% | 1.98% |
| 2022 to 2023 | Quarter 4: January to March | Visibility | 4.32% | 6.77% | Not set | Not set | 4.32% | 7.86% |
| 2022 to 2023 | Quarter 4: January to March | Overall initial failure rate | 25.63% | Not set | 6.99% | Not set | 18.64% | Not set |
| 2022 to 2023 | Quarter 4: January to March | Average defects per initial test failure | Not set | 0.03 | Not set | 0.43 | Not set | 0.03 |
| 2022 to 2023 | Quarter 3: October to December | Body, chassis, structure | 4.44% | 10.32% | 0.80% | 9.34% | 3.87% | 10.47% |
| 2022 to 2023 | Quarter 3: October to December | Brakes | 8.78% | 22.61% | 1.96% | 24.70% | 7.92% | 22.28% |
| 2022 to 2023 | Quarter 3: October to December | Buses and coaches supplementary tests | 1.15% | 1.88% | 0.06% | 0.56% | 1.11% | 2.09% |
| 2022 to 2023 | Quarter 3: October to December | Identification of the vehicle | 0.20% | 0.33% | Not set | Not set | 0.20% | 0.38% |
| 2022 to 2023 | Quarter 3: October to December | Lamps, reflectors and electrical equipment | 10.01% | 22.45% | 0.19% | 1.85% | 9.95% | 25.70% |
| 2022 to 2023 | Quarter 3: October to December | Noise, emissions and leaks | 3.14% | 4.54% | 0.08% | 0.83% | 3.09% | 5.12% |
| 2022 to 2023 | Quarter 3: October to December | Road Wheels | 0.06% | 0.11% | 0.01% | 0.09% | 0.06% | 0.12% |
| 2022 to 2023 | Quarter 3: October to December | Seat belt installation check | 0.01% | 0.01% | Not set | Not set | 0.01% | 0.01% |
| 2022 to 2023 | Quarter 3: October to December | Seat belts and supplementary restraint systems | 3.50% | 7.07% | 0.19% | 2.50% | 3.34% | 7.79% |
| 2022 to 2023 | Quarter 3: October to December | Speedometer and speed limiter | 0.38% | 0.52% | Not set | Not set | 0.38% | 0.60% |
| 2022 to 2023 | Quarter 3: October to December | Steering | 1.35% | 2.14% | 0.06% | 0.56% | 1.30% | 2.39% |
| 2022 to 2023 | Quarter 3: October to December | Suspension | 5.61% | 12.59% | 0.60% | 6.94% | 5.20% | 13.48% |
| 2022 to 2023 | Quarter 3: October to December | Tyres | 4.28% | 8.72% | 3.44% | 52.45% | 0.96% | 1.82% |
| 2022 to 2023 | Quarter 3: October to December | Visibility | 4.05% | 6.73% | 0.02% | 0.19% | 4.04% | 7.76% |
| 2022 to 2023 | Quarter 3: October to December | Overall initial failure rate | 25.22% | Not set | 6.60% | Not set | 18.62% | Not set |
| 2022 to 2023 | Quarter 3: October to December | Average defects per initial test failure | Not set | 2.92 | Not set | 0.4 | Not set | 2.52 |
| 2022 to 2023 | Quarter 2: July to September | Body, chassis, structure | 4.74% | 10.43% | 0.79% | 9.62% | 4.19% | 10.56% |
| 2022 to 2023 | Quarter 2: July to September | Brakes | 9.57% | 22.08% | 2.22% | 26.17% | 8.62% | 21.42% |
| 2022 to 2023 | Quarter 2: July to September | Buses and coaches supplementary tests | 1.25% | 1.88% | 0.09% | 0.82% | 1.16% | 2.05% |
| 2022 to 2023 | Quarter 2: July to September | Identification of the vehicle | 0.12% | 0.22% | Not set | Not set | 0.12% | 0.25% |
| 2022 to 2023 | Quarter 2: July to September | Lamps, reflectors and electrical equipment | 10.50% | 22.86% | 0.23% | 2.09% | 10.35% | 26.18% |
| 2022 to 2023 | Quarter 2: July to September | Noise, emissions and leaks | 2.98% | 4.01% | 0.12% | 1.12% | 2.90% | 4.47% |
| 2022 to 2023 | Quarter 2: July to September | Road Wheels | 0.09% | 0.12% | 0.02% | 0.15% | 0.07% | 0.12% |
| 2022 to 2023 | Quarter 2: July to September | Seat belt installation check | 0.06% | 0.09% | Not set | Not set | 0.06% | 0.11% |
| 2022 to 2023 | Quarter 2: July to September | Seat belts and supplementary restraint systems | 3.35% | 6.99% | 0.17% | 2.09% | 3.21% | 7.77% |
| 2022 to 2023 | Quarter 2: July to September | Speedometer and speed limiter | 0.30% | 0.38% | Not set | Not set | 0.30% | 0.44% |
| 2022 to 2023 | Quarter 2: July to September | Steering | 1.56% | 2.33% | 0.11% | 1.12% | 1.46% | 2.53% |
| 2022 to 2023 | Quarter 2: July to September | Suspension | 5.49% | 12.13% | 0.63% | 7.01% | 5.14% | 12.95% |
| 2022 to 2023 | Quarter 2: July to September | Tyres | 4.29% | 8.97% | 3.26% | 49.59% | 1.24% | 2.48% |
| 2022 to 2023 | Quarter 2: July to September | Visibility | 4.68% | 7.51% | 0.02% | 0.22% | 4.66% | 8.68% |
| 2022 to 2023 | Quarter 2: July to September | Overall initial failure rate | 26.23% | Not set | 6.85% | Not set | 19.38% | Not set |
| 2022 to 2023 | Quarter 2: July to September | Average defects per initial test failure | Not set | 3 | Not set | 0.41 | Not set | 2.59 |
| 2022 to 2023 | Quarter 1: April to June | Body, chassis, structure | 5.12% | 10.05% | 0.72% | 7.50% | 4.62% | 10.44% |
| 2022 to 2023 | Quarter 1: April to June | Brakes | 10.33% | 22.20% | 2.15% | 24.30% | 9.52% | 21.88% |
| 2022 to 2023 | Quarter 1: April to June | Buses and coaches supplementary tests | 1.50% | 2.04% | 0.06% | 0.47% | 1.46% | 2.28% |
| 2022 to 2023 | Quarter 1: April to June | Identification of the vehicle | 0.26% | 0.36% | Not set | Not set | 0.26% | 0.42% |
| 2022 to 2023 | Quarter 1: April to June | Lamps, reflectors and electrical equipment | 12.06% | 23.37% | 0.26% | 2.25% | 11.95% | 26.60% |
| 2022 to 2023 | Quarter 1: April to June | Noise, emissions and leaks | 3.12% | 3.77% | 0.11% | 0.94% | 3.06% | 4.20% |
| 2022 to 2023 | Quarter 1: April to June | Road Wheels | 0.10% | 0.11% | Not set | Not set | 0.10% | 0.13% |
| 2022 to 2023 | Quarter 1: April to June | Seat belt installation check | 0.06% | 0.09% | Not set | Not set | 0.06% | 0.10% |
| 2022 to 2023 | Quarter 1: April to June | Seat belts and supplementary restraint systems | 3.94% | 6.68% | 0.20% | 1.88% | 3.81% | 7.42% |
| 2022 to 2023 | Quarter 1: April to June | Speedometer and speed limiter | 0.26% | 0.29% | Not set | Not set | 0.26% | 0.33% |
| 2022 to 2023 | Quarter 1: April to June | Steering | 1.54% | 1.85% | 0.07% | 0.56% | 1.48% | 2.05% |
| 2022 to 2023 | Quarter 1: April to June | Suspension | 6.65% | 12.94% | 0.69% | 7.79% | 6.18% | 13.73% |
| 2022 to 2023 | Quarter 1: April to June | Tyres | 5.05% | 8.81% | 4.03% | 54.03% | 1.24% | 1.89% |
| 2022 to 2023 | Quarter 1: April to June | Visibility | 5.26% | 7.44% | 0.03% | 0.28% | 5.25% | 8.54% |
| 2022 to 2023 | Quarter 1: April to June | Overall initial failure rate | 28.01% | Not set | 7.38% | Not set | 20.63% | Not set |
| 2022 to 2023 | Quarter 1: April to June | Average defects per initial test failure | Not set | 3.2 | Not set | 0.42 | Not set | 2.77 |
| 2021 to 2022 | Total | Body, chassis, structure | 4.39% | 9.24% | 0.81% | 8.82% | 3.85% | 9.31% |
| 2021 to 2022 | Total | Brakes | 9.98% | 23.56% | 2.21% | 23.12% | 9.04% | 23.64% |
| 2021 to 2022 | Total | Buses and coaches supplementary tests | 1.49% | 2.17% | 0.09% | 0.68% | 1.41% | 2.44% |
| 2021 to 2022 | Total | Identification of the vehicle | 0.22% | 0.31% | Not set | Not set | 0.22% | 0.36% |
| 2021 to 2022 | Total | Lamps, reflectors and electrical equipment | 10.50% | 21.39% | 0.24% | 1.90% | 10.38% | 24.92% |
| 2021 to 2022 | Total | Noise, emissions and leaks | 3.00% | 3.86% | 0.11% | 0.87% | 2.92% | 4.40% |
| 2021 to 2022 | Total | Road Wheels | 0.10% | 0.14% | 0.02% | 0.19% | 0.08% | 0.13% |
| 2021 to 2022 | Total | Seat belt installation check | 0.04% | 0.08% | Not set | Not set | 0.04% | 0.09% |
| 2021 to 2022 | Total | Seat belts and supplementary restraint systems | 3.48% | 6.65% | 0.18% | 1.76% | 3.33% | 7.53% |
| 2021 to 2022 | Total | Speedometer and speed limiter | 0.33% | 0.40% | Not set | Not set | 0.33% | 0.48% |
| 2021 to 2022 | Total | Steering | 1.48% | 2.10% | 0.09% | 0.70% | 1.42% | 2.35% |
| 2021 to 2022 | Total | Suspension | 5.46% | 11.55% | 0.52% | 5.08% | 5.11% | 12.72% |
| 2021 to 2022 | Total | Tyres | 5.40% | 10.65% | 4.40% | 56.77% | 1.23% | 2.29% |
| 2021 to 2022 | Total | Visibility | 5.01% | 7.92% | 0.01% | 0.09% | 5.00% | 9.34% |
| 2021 to 2022 | Total | Overall initial failure rate | 26.56% | Not set | 7.74% | Not set | 18.81% | Not set |
| 2021 to 2022 | Total | Average defects per initial test failure | Not set | 3.14 | Not set | 0.48 | Not set | 2.66 |
| 2021 to 2022 | Quarter 4: January to March | Body, chassis, structure | 5.08% | 10.56% | 0.87% | 9.97% | 4.42% | 10.65% |
| 2021 to 2022 | Quarter 4: January to March | Brakes | 9.90% | 22.70% | 2.20% | 23.30% | 9.10% | 22.70% |
| 2021 to 2022 | Quarter 4: January to March | Buses and coaches supplementary tests | 1.50% | 2.20% | 0.10% | 0.60% | 1.50% | 2.50% |
| 2021 to 2022 | Quarter 4: January to March | Identification of the vehicle | 0.20% | 0.30% | 0.00% | 0.00% | 0.20% | 0.30% |
| 2021 to 2022 | Quarter 4: January to March | Lamps, reflectors and electrical equipment | 10.30% | 20.90% | 0.30% | 2.10% | 10.20% | 24.00% |
| 2021 to 2022 | Quarter 4: January to March | Noise, emissions and leaks | 3.20% | 4.00% | 0.10% | 0.90% | 3.20% | 4.60% |
| 2021 to 2022 | Quarter 4: January to March | Road Wheels | 0.10% | 0.20% | 0.00% | 0.20% | 0.10% | 0.20% |
| 2021 to 2022 | Quarter 4: January to March | Seat belt installation check | 0.00% | 0.10% | 0.00% | 0.00% | 0.00% | 0.10% |
| 2021 to 2022 | Quarter 4: January to March | Seat belts and supplementary restraint systems | 3.80% | 7.30% | 0.20% | 2.30% | 3.70% | 8.10% |
| 2021 to 2022 | Quarter 4: January to March | Speedometer and speed limiter | 0.40% | 0.50% | 0.00% | 0.00% | 0.40% | 0.60% |
| 2021 to 2022 | Quarter 4: January to March | Steering | 1.50% | 2.20% | 0.10% | 0.60% | 1.50% | 2.50% |
| 2021 to 2022 | Quarter 4: January to March | Suspension | 5.80% | 12.20% | 0.60% | 5.90% | 5.40% | 13.20% |
| 2021 to 2022 | Quarter 4: January to March | Tyres | 5.00% | 9.30% | 4.20% | 54.00% | 1.10% | 2.00% |
| 2021 to 2022 | Quarter 4: January to March | Visibility | 4.90% | 7.50% | 0.00% | 0.10% | 4.90% | 8.70% |
| 2021 to 2022 | Quarter 4: January to March | Overall initial failure rate | 26.30% | Not set | 7.60% | Not set | 18.70% | Not set |
| 2021 to 2022 | Quarter 4: January to March | Average defects per initial test failure | Not set | 3.26 | Not set | 0.46 | Not set | 2.8 |
| 2021 to 2022 | Quarter 3: October to December | Body, chassis, structure | 4.34% | 9.64% | 0.90% | 9.89% | 3.77% | 9.59% |
| 2021 to 2022 | Quarter 3: October to December | Brakes | 9.38% | 22.85% | 2.33% | 23.91% | 8.37% | 22.64% |
| 2021 to 2022 | Quarter 3: October to December | Buses and coaches supplementary tests | 1.50% | 2.28% | 0.10% | 0.73% | 1.41% | 2.58% |
| 2021 to 2022 | Quarter 3: October to December | Identification of the vehicle | 0.22% | 0.36% | 0.00% | 0.00% | 0.22% | 0.43% |
| 2021 to 2022 | Quarter 3: October to December | Lamps, reflectors and electrical equipment | 10.82% | 21.79% | 0.24% | 2.00% | 10.70% | 25.62% |
| 2021 to 2022 | Quarter 3: October to December | Noise, emissions and leaks | 2.69% | 3.52% | 0.07% | 0.53% | 2.63% | 4.10% |
| 2021 to 2022 | Quarter 3: October to December | Road Wheels | 0.08% | 0.12% | 0.02% | 0.20% | 0.07% | 0.10% |
| 2021 to 2022 | Quarter 3: October to December | Seat belt installation check | 0.07% | 0.09% | 0.00% | 0.00% | 0.07% | 0.10% |
| 2021 to 2022 | Quarter 3: October to December | Seat belts and supplementary restraint systems | 3.44% | 6.48% | 0.17% | 1.54% | 3.31% | 7.44% |
| 2021 to 2022 | Quarter 3: October to December | Speedometer and speed limiter | 0.28% | 0.37% | 0.00% | 0.00% | 0.28% | 0.44% |
| 2021 to 2022 | Quarter 3: October to December | Steering | 1.72% | 2.43% | 0.11% | 0.94% | 1.64% | 2.72% |
| 2021 to 2022 | Quarter 3: October to December | Suspension | 5.52% | 12.10% | 0.48% | 4.54% | 5.21% | 13.56% |
| 2021 to 2022 | Quarter 3: October to December | Tyres | 5.30% | 10.96% | 4.34% | 55.58% | 1.24% | 2.32% |
| 2021 to 2022 | Quarter 3: October to December | Visibility | 4.45% | 7.02% | 0.02% | 0.13% | 4.45% | 8.36% |
| 2021 to 2022 | Quarter 3: October to December | Overall initial failure rate | 26.20% | Not set | 7.70% | Not set | 18.50% | Not set |
| 2021 to 2022 | Quarter 3: October to December | Average defects per initial test failure | Not set | 3.09 | Not set | 0.5 | Not set | 2.59 |
| 2021 to 2022 | Quarter 2: July to September | Body, chassis, structure | 4.24% | 9.43% | 0.77% | 9.07% | 3.69% | 9.49% |
| 2021 to 2022 | Quarter 2: July to September | Brakes | 10.08% | 23.65% | 2.07% | 22.32% | 9.09% | 23.89% |
| 2021 to 2022 | Quarter 2: July to September | Buses and coaches supplementary tests | 1.39% | 2.06% | 0.08% | 0.63% | 1.32% | 2.30% |
| 2021 to 2022 | Quarter 2: July to September | Identification of the vehicle | 0.19% | 0.25% | 0.00% | 0.00% | 0.19% | 0.30% |
| 2021 to 2022 | Quarter 2: July to September | Lamps, reflectors and electrical equipment | 10.08% | 20.77% | 0.26% | 2.16% | 9.96% | 24.02% |
| 2021 to 2022 | Quarter 2: July to September | Noise, emissions and leaks | 2.99% | 4.02% | 0.12% | 1.01% | 2.92% | 4.54% |
| 2021 to 2022 | Quarter 2: July to September | Road Wheels | 0.09% | 0.15% | 0.03% | 0.38% | 0.06% | 0.11% |
| 2021 to 2022 | Quarter 2: July to September | Seat belt installation check | 0.02% | 0.09% | 0.00% | 0.00% | 0.02% | 0.11% |
| 2021 to 2022 | Quarter 2: July to September | Seat belts and supplementary restraint systems | 3.41% | 6.49% | 0.19% | 1.84% | 3.23% | 7.30% |
| 2021 to 2022 | Quarter 2: July to September | Speedometer and speed limiter | 0.30% | 0.38% | 0.00% | 0.00% | 0.30% | 0.44% |
| 2021 to 2022 | Quarter 2: July to September | Steering | 1.50% | 2.16% | 0.08% | 0.63% | 1.45% | 2.43% |
| 2021 to 2022 | Quarter 2: July to September | Suspension | 5.44% | 12.08% | 0.51% | 5.07% | 5.10% | 13.30% |
| 2021 to 2022 | Quarter 2: July to September | Tyres | 5.28% | 10.30% | 4.30% | 56.69% | 1.14% | 2.20% |
| 2021 to 2022 | Quarter 2: July to September | Visibility | 5.00% | 8.17% | 0.02% | 0.19% | 5.00% | 9.57% |
| 2021 to 2022 | Quarter 2: July to September | Overall Initial Failure Rate | 26.60% | Not set | 7.50% | Not set | 19.10% | Not set |
| 2021 to 2022 | Quarter 2: July to September | Average defects per Initial Test Failure | Not set | 3.09 | Not set | 0.46 | Not set | 2.63 |
| 2021 to 2022 | Quarter 1: April to June | Body, chassis, structure | 4.76% | 7.77% | 0.90% | 6.74% | 4.21% | 7.97% |
| 2021 to 2022 | Quarter 1: April to June | Brakes | 12.55% | 25.17% | 2.76% | 25.08% | 11.40% | 25.19% |
| 2021 to 2022 | Quarter 1: April to June | Buses and coaches supplementary tests | 1.73% | 2.04% | 0.10% | 0.61% | 1.64% | 2.30% |
| 2021 to 2022 | Quarter 1: April to June | Identification of the vehicle | 0.29% | 0.30% | 0.00% | 0.00% | 0.29% | 0.35% |
| 2021 to 2022 | Quarter 1: April to June | Lamps, reflectors and electrical equipment | 12.39% | 22.03% | 0.29% | 1.82% | 12.26% | 25.77% |
| 2021 to 2022 | Quarter 1: April to June | Noise, emissions and leaks | 3.46% | 3.60% | 0.17% | 1.06% | 3.34% | 4.07% |
| 2021 to 2022 | Quarter 1: April to June | Road Wheels | 0.13% | 0.13% | 0.01% | 0.08% | 0.12% | 0.14% |
| 2021 to 2022 | Quarter 1: April to June | Seat belt installation check | 0.02% | 0.02% | 0.00% | 0.00% | 0.02% | 0.03% |
| 2021 to 2022 | Quarter 1: April to June | Seat belts and supplementary restraint systems | 3.86% | 6.34% | 0.17% | 1.14% | 3.70% | 7.31% |
| 2021 to 2022 | Quarter 1: April to June | Speedometer and speed limiter | 0.35% | 0.37% | 0.00% | 0.00% | 0.35% | 0.43% |
| 2021 to 2022 | Quarter 1: April to June | Steering | 1.47% | 1.69% | 0.07% | 0.45% | 1.41% | 1.92% |
| 2021 to 2022 | Quarter 1: April to June | Suspension | 6.18% | 10.44% | 0.56% | 4.39% | 5.81% | 11.56% |
| 2021 to 2022 | Quarter 1: April to June | Tyres | 6.80% | 11.19% | 5.53% | 58.41% | 1.58% | 2.45% |
| 2021 to 2022 | Quarter 1: April to June | Visibility | 6.71% | 8.91% | 0.04% | 0.23% | 6.69% | 10.52% |
| 2021 to 2022 | Quarter 1: April to June | Overall Initial Failure Rate | 30.20% | Not set | 9.50% | Not set | 20.70% | Not set |
| 2021 to 2022 | Quarter 1: April to June | Average defects per Initial Test Failure | Not set | 3.35 | Not set | 0.52 | Not set | 2.83 |
| 2020 to 2021 | Total | Body, chassis, structure | 3.89% | 8.69% | 0.66% | 9.89% | 3.45% | 8.53% |
| 2020 to 2021 | Total | Brakes | 9.91% | 26.59% | 2.32% | 34.64% | 8.96% | 25.50% |
| 2020 to 2021 | Total | Buses and coaches supplementary tests | 1.43% | 2.36% | 0.08% | 1.02% | 1.37% | 2.54% |
| 2020 to 2021 | Total | Identification of the vehicle | 0.25% | 0.37% | Not set | Not set | 0.25% | 0.42% |
| 2020 to 2021 | Total | Lamps, reflectors and electrical equipment | 10.43% | 22.94% | 0.25% | 2.99% | 10.29% | 25.62% |
| 2020 to 2021 | Total | Noise, emissions and leaks | 2.76% | 3.99% | 0.08% | 0.96% | 2.70% | 4.40% |
| 2020 to 2021 | Total | Road Wheels | 0.08% | 0.11% | 0.02% | 0.21% | 0.06% | 0.10% |
| 2020 to 2021 | Total | Seat belt installation check | 0.06% | 0.12% | Not set | Not set | 0.06% | 0.14% |
| 2020 to 2021 | Total | Seat belts and supplementary restraint systems | 3.46% | 7.07% | 0.17% | 2.30% | 3.33% | 7.71% |
| 2020 to 2021 | Total | Speedometer and speed limiter | 0.30% | 0.43% | Not set | Not set | 0.30% | 0.49% |
| 2020 to 2021 | Total | Steering | 1.46% | 2.32% | 0.07% | 0.78% | 1.41% | 2.53% |
| 2020 to 2021 | Total | Suspension | 4.90% | 11.33% | 0.53% | 7.38% | 4.55% | 11.86% |
| 2020 to 2021 | Total | Tyres | 3.35% | 6.21% | 2.48% | 39.54% | 0.97% | 1.72% |
| 2020 to 2021 | Total | Visibility | 4.40% | 7.47% | 0.03% | 0.30% | 4.37% | 8.43% |
| 2020 to 2021 | Total | Overall Initial Failure Rate | 24.95% | Not set | 5.97% | Not set | 18.97% | Not set |
| 2020 to 2021 | Total | Average defects per Initial Test Failure | Not set | 2.99 | Not set | 0.36 | Not set | 2.64 |
| 2020 to 2021 | Quarter 4: January to March | Body, chassis, structure | 4.28% | 8.86% | 0.78% | 7.84% | 3.78% | 9.03% |
| 2020 to 2021 | Quarter 4: January to March | Brakes | 10.52% | 25.60% | 2.38% | 27.49% | 9.64% | 25.30% |
| 2020 to 2021 | Quarter 4: January to March | Buses and coaches supplementary tests | 1.41% | 2.13% | 0.08% | 0.73% | 1.33% | 2.35% |
| 2020 to 2021 | Quarter 4: January to March | Identification of the vehicle | 0.21% | 0.27% | 0.00% | 0.00% | 0.21% | 0.31% |
| 2020 to 2021 | Quarter 4: January to March | Lamps, reflectors and electrical equipment | 10.79% | 21.64% | 0.35% | 2.99% | 10.62% | 24.66% |
| 2020 to 2021 | Quarter 4: January to March | Noise, emissions and leaks | 2.93% | 3.78% | 0.05% | 0.40% | 2.90% | 4.33% |
| 2020 to 2021 | Quarter 4: January to March | Road Wheels | 0.10% | 0.12% | 0.00% | 0.00% | 0.10% | 0.14% |
| 2020 to 2021 | Quarter 4: January to March | Seat belt installation check | 0.06% | 0.11% | 0.00% | 0.00% | 0.06% | 0.13% |
| 2020 to 2021 | Quarter 4: January to March | Seat belts and supplementary restraint systems | 3.52% | 6.74% | 0.14% | 1.46% | 3.41% | 7.59% |
| 2020 to 2021 | Quarter 4: January to March | Speedometer and speed limiter | 0.49% | 0.62% | 0.00% | 0.00% | 0.49% | 0.72% |
| 2020 to 2021 | Quarter 4: January to March | Steering | 1.50% | 2.19% | 0.03% | 0.24% | 1.49% | 2.51% |
| 2020 to 2021 | Quarter 4: January to March | Suspension | 5.17% | 11.10% | 0.61% | 6.22% | 4.77% | 11.89% |
| 2020 to 2021 | Quarter 4: January to March | Tyres | 4.84% | 8.98% | 3.80% | 52.38% | 1.19% | 1.96% |
| 2020 to 2021 | Quarter 4: January to March | Visibility | 5.11% | 7.85% | 0.03% | 0.24% | 5.08% | 9.08% |
| 2020 to 2021 | Quarter 4: January to March | Overall initial failure rate | 26.50% | Not set | 7.30% | Not set | 19.20% | Not set |
| 2020 to 2021 | Quarter 4: January to March | Average defects per initial test failure | Not set | 3.13 | Not set | 0.44 | Not set | 2.7 |
| 2020 to 2021 | Quarter 3: October to December | Body, chassis, structure | 4.48% | 9.62% | 0.76% | 11.33% | 3.95% | 9.42% |
| 2020 to 2021 | Quarter 3: October to December | Brakes | 10.64% | 26.39% | 2.47% | 37.30% | 9.59% | 25.10% |
| 2020 to 2021 | Quarter 3: October to December | Buses and coaches supplementary tests | 1.47% | 2.23% | 0.10% | 1.17% | 1.39% | 2.36% |
| 2020 to 2021 | Quarter 3: October to December | Identification of the vehicle | 0.28% | 0.41% | 0.00% | 0.00% | 0.28% | 0.46% |
| 2020 to 2021 | Quarter 3: October to December | Lamps, reflectors and electrical equipment | 11.52% | 23.58% | 0.25% | 3.03% | 11.37% | 26.03% |
| 2020 to 2021 | Quarter 3: October to December | Noise, emissions and leaks | 3.01% | 4.14% | 0.17% | 2.05% | 2.91% | 4.39% |
| 2020 to 2021 | Quarter 3: October to December | Road Wheels | 0.10% | 0.12% | 0.03% | 0.29% | 0.08% | 0.10% |
| 2020 to 2021 | Quarter 3: October to December | Seat belt installation check | 0.07% | 0.13% | 0.00% | 0.00% | 0.07% | 0.15% |
| 2020 to 2021 | Quarter 3: October to December | Seat belts and supplementary restraint systems | 3.48% | 6.63% | 0.23% | 3.32% | 3.35% | 7.02% |
| 2020 to 2021 | Quarter 3: October to December | Speedometer and speed limiter | 0.23% | 0.30% | 0.00% | 0.00% | 0.23% | 0.34% |
| 2020 to 2021 | Quarter 3: October to December | Steering | 1.64% | 2.41% | 0.13% | 1.66% | 1.54% | 2.49% |
| 2020 to 2021 | Quarter 3: October to December | Suspension | 5.66% | 12.75% | 0.56% | 8.50% | 5.37% | 13.25% |
| 2020 to 2021 | Quarter 3: October to December | Tyres | 2.80% | 4.53% | 2.04% | 30.86% | 0.83% | 1.40% |
| 2020 to 2021 | Quarter 3: October to December | Visibility | 4.22% | 6.74% | 0.04% | 0.49% | 4.19% | 7.48% |
| 2020 to 2021 | Quarter 3: October to December | Overall initial failure rate | 25.80% | Not set | 6.00% | Not set | 19.80% | Not set |
| 2020 to 2021 | Quarter 3: October to December | Average defects per initial test failure | Not set | 3.12 | Not set | 0.33 | Not set | 2.79 |
| 2020 to 2021 | Quarter 2: July to September | Body, chassis, structure | 4.02% | 8.40% | 0.63% | 10.73% | 3.58% | 8.11% |
| 2020 to 2021 | Quarter 2: July to September | Brakes | 10.58% | 28.11% | 2.54% | 39.08% | 9.59% | 26.72% |
| 2020 to 2021 | Quarter 2: July to September | Buses and coaches supplementary tests | 1.65% | 2.66% | 0.11% | 1.60% | 1.55% | 2.79% |
| 2020 to 2021 | Quarter 2: July to September | Identification of the vehicle | 0.27% | 0.37% | 0.00% | 0.00% | 0.27% | 0.42% |
| 2020 to 2021 | Quarter 2: July to September | Lamps, reflectors and electrical equipment | 10.53% | 22.29% | 0.24% | 3.01% | 10.37% | 24.72% |
| 2020 to 2021 | Quarter 2: July to September | Noise, emissions and leaks | 3.01% | 4.18% | 0.09% | 1.04% | 2.92% | 4.58% |
| 2020 to 2021 | Quarter 2: July to September | Road Wheels | 0.05% | 0.07% | 0.02% | 0.38% | 0.02% | 0.04% |
| 2020 to 2021 | Quarter 2: July to September | Seat belt installation check | 0.06% | 0.07% | 0.00% | 0.00% | 0.06% | 0.08% |
| 2020 to 2021 | Quarter 2: July to September | Seat belts and supplementary restraint systems | 3.78% | 7.27% | 0.18% | 2.45% | 3.62% | 7.88% |
| 2020 to 2021 | Quarter 2: July to September | Speedometer and speed limiter | 0.30% | 0.41% | 0.00% | 0.00% | 0.30% | 0.46% |
| 2020 to 2021 | Quarter 2: July to September | Steering | 1.59% | 2.42% | 0.08% | 0.94% | 1.54% | 2.60% |
| 2020 to 2021 | Quarter 2: July to September | Suspension | 4.95% | 10.69% | 0.54% | 7.53% | 4.53% | 11.08% |
| 2020 to 2021 | Quarter 2: July to September | Tyres | 3.12% | 5.24% | 2.17% | 33.05% | 1.03% | 1.72% |
| 2020 to 2021 | Quarter 2: July to September | Visibility | 4.70% | 7.81% | 0.02% | 0.19% | 4.68% | 8.78% |
| 2020 to 2021 | Quarter 2: July to September | Overall Initial Failure Rate | 26.00% | Not set | 5.90% | Not set | 20.10% | Not set |
| 2020 to 2021 | Quarter 2: July to September | Average defects per Initial Test Failure | Not set | 2.96 | Not set | 0.33 | Not set | 2.63 |
| 2020 to 2021 | Quarter 1: April to June | Body, chassis, structure | 3.40% | 7.51% | 0.50% | 9.69% | 3.05% | 7.25% |
| 2020 to 2021 | Quarter 1: April to June | Brakes | 9.39% | 26.38% | 2.15% | 41.88% | 8.39% | 24.51% |
| 2020 to 2021 | Quarter 1: April to June | Buses and coaches supplementary tests | 1.15% | 2.00% | 0.04% | 0.52% | 1.13% | 2.17% |
| 2020 to 2021 | Quarter 1: April to June | Identification of the vehicle | 0.27% | 0.42% | 0.00% | 0.00% | 0.27% | 0.47% |
| 2020 to 2021 | Quarter 1: April to June | Lamps, reflectors and electrical equipment | 10.14% | 24.69% | 0.25% | 3.66% | 10.04% | 27.22% |
| 2020 to 2021 | Quarter 1: April to June | Noise, emissions and leaks | 2.19% | 3.29% | 0.08% | 1.05% | 2.11% | 3.56% |
| 2020 to 2021 | Quarter 1: April to June | Road Wheels | 0.06% | 0.08% | 0.00% | 0.00% | 0.06% | 0.09% |
| 2020 to 2021 | Quarter 1: April to June | Seat belt installation check | 0.04% | 0.08% | 0.00% | 0.00% | 0.04% | 0.09% |
| 2020 to 2021 | Quarter 1: April to June | Seat belts and supplementary restraint systems | 3.57% | 8.10% | 0.08% | 1.31% | 3.49% | 8.92% |
| 2020 to 2021 | Quarter 1: April to June | Speedometer and speed limiter | 0.15% | 0.22% | 0.00% | 0.00% | 0.15% | 0.25% |
| 2020 to 2021 | Quarter 1: April to June | Steering | 1.36% | 2.42% | 0.00% | 0.00% | 1.36% | 2.71% |
| 2020 to 2021 | Quarter 1: April to June | Suspension | 4.72% | 12.09% | 0.40% | 6.28% | 4.43% | 12.79% |
| 2020 to 2021 | Quarter 1: April to June | Tyres | 2.73% | 4.92% | 2.07% | 35.34% | 0.73% | 1.26% |
| 2020 to 2021 | Quarter 1: April to June | Visibility | 4.20% | 7.79% | 0.02% | 0.26% | 4.19% | 8.70% |
| 2020 to 2021 | Quarter 1: April to June | Overall Initial Failure Rate | 23.50% | Not set | 5.00% | Not set | 18.50% | Not set |
| 2020 to 2021 | Quarter 1: April to June | Average defects per Initial Test Failure | Not set | 2.91 | Not set | 0.31 | Not set | 2.6 |
| 2019 to 2020 | Total | Body, chassis, structure | 5.02% | 10.08% | 0.97% | 12.39% | 4.38% | 9.76% |
| 2019 to 2020 | Total | Brakes | 9.95% | 22.98% | 2.69% | 35.45% | 8.71% | 21.24% |
| 2019 to 2020 | Total | Buses and coaches supplementary tests | 1.48% | 2.22% | 0.11% | 1.17% | 1.38% | 2.36% |
| 2019 to 2020 | Total | Identification of the vehicle | 0.29% | 0.39% | Not set | Not set | 0.29% | 0.44% |
| 2019 to 2020 | Total | Lamps, reflectors and electrical equipment | 12.07% | 24.70% | 0.31% | 3.26% | 11.91% | 27.70% |
| 2019 to 2020 | Total | Noise, emissions and leaks | 3.04% | 3.95% | 0.14% | 1.44% | 2.94% | 4.30% |
| 2019 to 2020 | Total | Road Wheels | 0.07% | 0.09% | 0.01% | 0.14% | 0.06% | 0.08% |
| 2019 to 2020 | Total | Seat belt installation check | 0.07% | 0.11% | Not set | Not set | 0.07% | 0.12% |
| 2019 to 2020 | Total | Seat belts and supplementary restraint systems | 4.16% | 7.92% | 0.25% | 3.14% | 3.97% | 8.58% |
| 2019 to 2020 | Total | Speedometer and speed limiter | 0.39% | 0.49% | Not set | Not set | 0.39% | 0.56% |
| 2019 to 2020 | Total | Steering | 1.73% | 2.45% | 0.11% | 1.17% | 1.65% | 2.63% |
| 2019 to 2020 | Total | Suspension | 6.06% | 12.87% | 0.77% | 9.66% | 5.59% | 13.31% |
| 2019 to 2020 | Total | Tyres | 3.25% | 5.12% | 2.50% | 32.02% | 0.84% | 1.36% |
| 2019 to 2020 | Total | Visibility | 4.23% | 6.65% | 0.01% | 0.14% | 4.22% | 7.56% |
| 2019 to 2020 | Total | Overall Initial Failure Rate | 27.14% | Not set | 6.77% | Not set | 20.36% | Not set |
| 2019 to 2020 | Total | Average defects per Initial Test Failure | Not set | 3.01 | Not set | 0.37 | Not set | 2.64 |
| 2019 to 2020 | Quarter 4: January to March | Body, chassis, structure | 4.94% | 9.87% | 0.92% | 12.30% | 4.25% | 9.54% |
| 2019 to 2020 | Quarter 4: January to March | Brakes | 9.50% | 22.90% | 2.50% | 30.90% | 9.10% | 21.80% |
| 2019 to 2020 | Quarter 4: January to March | Buses and coaches supplementary tests | 1.40% | 2.00% | 0.10% | 1.30% | 1.30% | 2.10% |
| 2019 to 2020 | Quarter 4: January to March | Identification of the vehicle | 0.20% | 0.40% | 0.00% | 0.00% | 0.30% | 0.40% |
| 2019 to 2020 | Quarter 4: January to March | Lamps, reflectors and electrical equipment | 11.30% | 24.40% | 0.20% | 2.70% | 12.20% | 27.40% |
| 2019 to 2020 | Quarter 4: January to March | Noise, emissions and leaks | 2.60% | 4.00% | 0.10% | 1.40% | 3.00% | 4.40% |
| 2019 to 2020 | Quarter 4: January to March | Road Wheels | 0.10% | 0.10% | 0.00% | 0.50% | 0.10% | 0.10% |
| 2019 to 2020 | Quarter 4: January to March | Seat belt installation check | 0.10% | 0.10% | 0.00% | 0.00% | 0.10% | 0.10% |
| 2019 to 2020 | Quarter 4: January to March | Seat belts and supplementary restraint systems | 4.00% | 8.10% | 0.30% | 3.70% | 4.20% | 8.70% |
| 2019 to 2020 | Quarter 4: January to March | Speedometer and speed limiter | 0.40% | 0.50% | 0.00% | 0.00% | 0.40% | 0.50% |
| 2019 to 2020 | Quarter 4: January to March | Steering | 1.60% | 2.60% | 0.10% | 0.90% | 1.80% | 2.80% |
| 2019 to 2020 | Quarter 4: January to March | Suspension | 6.10% | 12.90% | 0.70% | 9.20% | 5.90% | 13.40% |
| 2019 to 2020 | Quarter 4: January to March | Tyres | 2.70% | 5.80% | 2.80% | 37.30% | 0.90% | 1.50% |
| 2019 to 2020 | Quarter 4: January to March | Visibility | 3.50% | 6.40% | 0.00% | 0.00% | 4.20% | 7.30% |
| 2019 to 2020 | Quarter 4: January to March | Overall initial failure rate | 28.10% | Not set | 6.70% | Not set | 21.30% | Not set |
| 2019 to 2020 | Quarter 4: January to March | Average defects per initial test failure | Not set | 2.94 | Not set | 0.35 | Not set | 2.59 |
| 2019 to 2020 | Quarter 3: October to December | Body, chassis, structure | 5.40% | 10.70% | 0.90% | 11.70% | 4.90% | 10.50% |
| 2019 to 2020 | Quarter 3: October to December | Brakes | 10.50% | 24.10% | 2.80% | 38.30% | 9.20% | 22.20% |
| 2019 to 2020 | Quarter 3: October to December | Buses and coaches supplementary tests | 1.50% | 2.10% | 0.10% | 1.00% | 1.40% | 2.30% |
| 2019 to 2020 | Quarter 3: October to December | Identification of the vehicle | 0.30% | 0.30% | 0.00% | 0.00% | 0.30% | 0.40% |
| 2019 to 2020 | Quarter 3: October to December | Lamps, reflectors and electrical equipment | 12.40% | 24.10% | 0.30% | 3.50% | 12.20% | 26.80% |
| 2019 to 2020 | Quarter 3: October to December | Noise, emissions and leaks | 2.80% | 3.60% | 0.20% | 1.90% | 2.70% | 3.80% |
| 2019 to 2020 | Quarter 3: October to December | Road Wheels | 0.10% | 0.10% | 0.00% | 0.20% | 0.10% | 0.10% |
| 2019 to 2020 | Quarter 3: October to December | Seat belt installation check | 0.10% | 0.10% | 0.00% | 0.00% | 0.10% | 0.20% |
| 2019 to 2020 | Quarter 3: October to December | Seat belts and supplementary restraint systems | 4.40% | 8.10% | 0.20% | 2.60% | 4.30% | 8.90% |
| 2019 to 2020 | Quarter 3: October to December | Speedometer and speed limiter | 0.40% | 0.50% | 0.00% | 0.00% | 0.40% | 0.60% |
| 2019 to 2020 | Quarter 3: October to December | Steering | 1.80% | 2.40% | 0.10% | 0.60% | 1.70% | 2.70% |
| 2019 to 2020 | Quarter 3: October to December | Suspension | 6.70% | 13.40% | 0.80% | 9.50% | 6.20% | 13.90% |
| 2019 to 2020 | Quarter 3: October to December | Tyres | 3.00% | 4.60% | 2.30% | 30.60% | 0.70% | 1.10% |
| 2019 to 2020 | Quarter 3: October to December | Visibility | 3.80% | 5.80% | 0.00% | 0.10% | 3.80% | 6.50% |
| 2019 to 2020 | Quarter 3: October to December | Overall initial failure rate | 27.80% | Not set | 6.70% | Not set | 21.10% | Not set |
| 2019 to 2020 | Quarter 3: October to December | Average defects per initial test failure | Not set | 3.04 | Not set | 0.36 | Not set | 2.68 |
| 2019 to 2020 | Quarter 2: July to September | Body, chassis, structure | 5.60% | 10.00% | 1.00% | 12.00% | 4.90% | 9.70% |
| 2019 to 2020 | Quarter 2: July to September | Brakes | 11.00% | 23.50% | 3.10% | 39.50% | 9.60% | 21.30% |
| 2019 to 2020 | Quarter 2: July to September | Buses and coaches supplementary tests | 1.60% | 2.40% | 0.10% | 1.40% | 1.50% | 2.60% |
| 2019 to 2020 | Quarter 2: July to September | Identification of the vehicle | 0.30% | 0.40% | 0.00% | 0.00% | 0.30% | 0.40% |
| 2019 to 2020 | Quarter 2: July to September | Lamps, reflectors and electrical equipment | 12.60% | 23.70% | 0.20% | 2.40% | 12.40% | 26.60% |
| 2019 to 2020 | Quarter 2: July to September | Noise, emissions and leaks | 3.40% | 4.00% | 0.10% | 1.30% | 3.30% | 4.30% |
| 2019 to 2020 | Quarter 2: July to September | Road Wheels | 0.10% | 0.10% | 0.00% | 0.00% | 0.10% | 0.10% |
| 2019 to 2020 | Quarter 2: July to September | Seat belt installation check | 0.10% | 0.10% | 0.00% | 0.00% | 0.10% | 0.10% |
| 2019 to 2020 | Quarter 2: July to September | Seat belts and supplementary restraint systems | 4.60% | 8.30% | 0.30% | 3.60% | 4.40% | 9.00% |
| 2019 to 2020 | Quarter 2: July to September | Speedometer and speed limiter | 0.40% | 0.40% | 0.00% | 0.00% | 0.40% | 0.50% |
| 2019 to 2020 | Quarter 2: July to September | Steering | 2.10% | 2.60% | 0.10% | 1.40% | 1.90% | 2.80% |
| 2019 to 2020 | Quarter 2: July to September | Suspension | 6.80% | 13.20% | 0.80% | 9.60% | 6.30% | 13.60% |
| 2019 to 2020 | Quarter 2: July to September | Tyres | 3.10% | 4.30% | 2.40% | 28.40% | 0.80% | 1.10% |
| 2019 to 2020 | Quarter 2: July to September | Visibility | 4.80% | 6.90% | 0.00% | 0.40% | 4.70% | 7.80% |
| 2019 to 2020 | Quarter 2: July to September | Overall Initial Failure Rate | 28.40% | Not set | 7.10% | Not set | 21.30% | Not set |
| 2019 to 2020 | Quarter 2: July to September | Average defects per Initial Test Failure | Not set | 3.15 | Not set | 0.37 | Not set | 2.78 |
| 2019 to 2020 | Quarter 1: April to June | Body, chassis, structure | 5.62% | 9.73% | 1.24% | 13.29% | 4.72% | 9.23% |
| 2019 to 2020 | Quarter 1: April to June | Brakes | 10.95% | 22.98% | 2.99% | 34.30% | 9.68% | 21.42% |
| 2019 to 2020 | Quarter 1: April to June | Buses and coaches supplementary tests | 1.59% | 2.16% | 0.10% | 0.89% | 1.52% | 2.34% |
| 2019 to 2020 | Quarter 1: April to June | Identification of the vehicle | 0.30% | 0.40% | 0.00% | 0.00% | 0.30% | 0.45% |
| 2019 to 2020 | Quarter 1: April to June | Lamps, reflectors and electrical equipment | 13.01% | 24.48% | 0.39% | 3.79% | 12.87% | 27.33% |
| 2019 to 2020 | Quarter 1: April to June | Noise, emissions and leaks | 3.42% | 4.05% | 0.13% | 1.19% | 3.31% | 4.45% |
| 2019 to 2020 | Quarter 1: April to June | Road Wheels | 0.09% | 0.10% | 0.01% | 0.07% | 0.08% | 0.10% |
| 2019 to 2020 | Quarter 1: April to June | Seat belt installation check | 0.07% | 0.08% | 0.00% | 0.00% | 0.07% | 0.09% |
| 2019 to 2020 | Quarter 1: April to June | Seat belts and supplementary restraint systems | 4.35% | 7.46% | 0.25% | 2.45% | 4.19% | 8.15% |
| 2019 to 2020 | Quarter 1: April to June | Speedometer and speed limiter | 0.44% | 0.50% | 0.00% | 0.00% | 0.44% | 0.56% |
| 2019 to 2020 | Quarter 1: April to June | Steering | 2.02% | 2.58% | 0.16% | 1.63% | 1.91% | 2.72% |
| 2019 to 2020 | Quarter 1: April to June | Suspension | 6.78% | 13.54% | 0.88% | 10.02% | 6.24% | 14.03% |
| 2019 to 2020 | Quarter 1: April to June | Tyres | 3.65% | 5.10% | 2.87% | 32.29% | 0.92% | 1.34% |
| 2019 to 2020 | Quarter 1: April to June | Visibility | 4.75% | 6.84% | 0.01% | 0.07% | 4.75% | 7.78% |
| 2019 to 2020 | Quarter 1: April to June | Overall Initial Failure Rate | 29.35% | Not set | 7.76% | Not set | 21.59% | Not set |
| 2019 to 2020 | Quarter 1: April to June | Average defects per Initial Test Failure | Not set | 3.1 | Not set | 0.4 | Not set | 2.7 |
| 2018 to 2019 | 20 May 2018 to 31 March 2019 | Lamps, reflectors and electrical equipment | 11.60% | 24.20% | 0.40% | 4.70% | 11.40% | 26.80% |
| 2018 to 2019 | 20 May 2018 to 31 March 2019 | Brakes | 9.90% | 24.20% | 2.60% | 36.90% | 8.70% | 22.50% |
| 2018 to 2019 | 20 May 2018 to 31 March 2019 | Suspension | 5.80% | 12.50% | 0.70% | 9.40% | 5.30% | 12.90% |
| 2018 to 2019 | 20 May 2018 to 31 March 2019 | Body, chassis, structure | 4.90% | 10.20% | 1.00% | 13.60% | 4.20% | 9.70% |
| 2018 to 2019 | 20 May 2018 to 31 March 2019 | Visibility | 4.20% | 6.80% | 0.00% | 0.30% | 4.20% | 7.70% |
| 2018 to 2019 | 20 May 2018 to 31 March 2019 | Seat belts and supplementary restraint systems | 4.00% | 7.60% | 0.20% | 3.10% | 3.80% | 8.20% |
| 2018 to 2019 | 20 May 2018 to 31 March 2019 | Noise, emissions and leaks | 3.00% | 4.10% | 0.20% | 2.30% | 2.80% | 4.30% |
| 2018 to 2019 | 20 May 2018 to 31 March 2019 | Tyres | 2.80% | 4.40% | 2.00% | 26.90% | 0.90% | 1.40% |
| 2018 to 2019 | 20 May 2018 to 31 March 2019 | Steering | 1.80% | 2.60% | 0.10% | 1.20% | 1.70% | 2.80% |
| 2018 to 2019 | 20 May 2018 to 31 March 2019 | Buses and coaches supplementary tests | 1.60% | 2.40% | 0.10% | 1.40% | 1.50% | 2.60% |
| 2018 to 2019 | 20 May 2018 to 31 March 2019 | Speedometer and speed limiter | 0.30% | 0.40% | 0.00% | 0.00% | 0.30% | 0.50% |
| 2018 to 2019 | 20 May 2018 to 31 March 2019 | Identification of the vehicle | 0.30% | 0.40% | 0.00% | 0.00% | 0.30% | 0.40% |
| 2018 to 2019 | 20 May 2018 to 31 March 2019 | Road Wheels | 0.10% | 0.10% | 0.00% | 0.20% | 0.10% | 0.10% |
| 2018 to 2019 | 20 May 2018 to 31 March 2019 | Seat belt installation check | 0.10% | 0.10% | 0.00% | 0.00% | 0.10% | 0.20% |
| 2018 to 2019 | 20 May 2018 to 31 March 2019 | Overall Initial Failure Rate | 29.80% | - | 7.60% | - | 22.20% | - |
| 2018 to 2019 | 20 May 2018 to 31 March 2019 | Average defects per Initial Test Failure | - | 2.71 | - | 0.32 | - | 2.39 |
| 2018 to 2019 | 1 April 2018 to 19 May 2018 | Body and structure | 6.20% | 10.90% | Not set | Not set | Not set | Not set |
| 2018 to 2019 | 1 April 2018 to 19 May 2018 | Brakes | 11.60% | 23.80% | Not set | Not set | Not set | Not set |
| 2018 to 2019 | 1 April 2018 to 19 May 2018 | Driver's view of the road | 5.70% | 8.00% | Not set | Not set | Not set | Not set |
| 2018 to 2019 | 1 April 2018 to 19 May 2018 | Driving controls | 0.60% | 0.60% | Not set | Not set | Not set | Not set |
| 2018 to 2019 | 1 April 2018 to 19 May 2018 | Fuel and exhaust | 2.60% | 3.10% | Not set | Not set | Not set | Not set |
| 2018 to 2019 | 1 April 2018 to 19 May 2018 | Lighting and signalling | 15.00% | 27.10% | Not set | Not set | Not set | Not set |
| 2018 to 2019 | 1 April 2018 to 19 May 2018 | Reg plates and VIN | 0.50% | 0.50% | Not set | Not set | Not set | Not set |
| 2018 to 2019 | 1 April 2018 to 19 May 2018 | Road wheels | 0.10% | 0.10% | Not set | Not set | Not set | Not set |
| 2018 to 2019 | 1 April 2018 to 19 May 2018 | Seat belts | 4.80% | 7.70% | Not set | Not set | Not set | Not set |
| 2018 to 2019 | 1 April 2018 to 19 May 2018 | Steering | 2.10% | 2.70% | Not set | Not set | Not set | Not set |
| 2018 to 2019 | 1 April 2018 to 19 May 2018 | Suspension | 6.50% | 10.70% | Not set | Not set | Not set | Not set |
| 2018 to 2019 | 1 April 2018 to 19 May 2018 | Towbars | 0.00% | 0.10% | Not set | Not set | Not set | Not set |
| 2018 to 2019 | 1 April 2018 to 19 May 2018 | Tyres | 3.30% | 4.60% | Not set | Not set | Not set | Not set |
| 2018 to 2019 | 1 April 2018 to 19 May 2018 | Overall Initial Failure Rate | 30.00% | - | Not set | Not set | Not set | Not set |
| 2018 to 2019 | 1 April 2018 to 19 May 2018 | Average defects per Initial Test Failure | - | 3.22 | Not set | Not set | Not set | Not set |
| 2017 to 2018 | Not set | Body and structure | 6.20% | 10.00% | Not set | Not set | Not set | Not set |
| 2017 to 2018 | Not set | Brakes | 11.50% | 23.10% | Not set | Not set | Not set | Not set |
| 2017 to 2018 | Not set | Driver's view of the road | 5.30% | 7.00% | Not set | Not set | Not set | Not set |
| 2017 to 2018 | Not set | Driving controls | 0.70% | 0.70% | Not set | Not set | Not set | Not set |
| 2017 to 2018 | Not set | Fuel and exhaust | 2.50% | 3.00% | Not set | Not set | Not set | Not set |
| 2017 to 2018 | Not set | Lighting and signalling | 15.20% | 26.70% | Not set | Not set | Not set | Not set |
| 2017 to 2018 | Not set | Reg plates and VIN | 0.40% | 0.40% | Not set | Not set | Not set | Not set |
| 2017 to 2018 | Not set | Road wheels | 0.10% | 0.10% | Not set | Not set | Not set | Not set |
| 2017 to 2018 | Not set | Seat belts | 5.50% | 9.10% | Not set | Not set | Not set | Not set |
| 2017 to 2018 | Not set | Steering | 2.40% | 2.90% | Not set | Not set | Not set | Not set |
| 2017 to 2018 | Not set | Suspension | 7.10% | 12.60% | Not set | Not set | Not set | Not set |
| 2017 to 2018 | Not set | Towbars | 0.10% | 0.20% | Not set | Not set | Not set | Not set |
| 2017 to 2018 | Not set | Tyres | 3.30% | 4.30% | Not set | Not set | Not set | Not set |
| 2017 to 2018 | Not set | Overall Initial Failure Rate | 30.30% | - | Not set | Not set | Not set | Not set |
| 2017 to 2018 | Not set | Average defects per Initial Test Failure | - | 3.27 | Not set | Not set | Not set | Not set |
| 2016 to 2017 | Not set | Body and structure | 6.30% | 9.90% | Not set | Not set | Not set | Not set |
| 2016 to 2017 | Not set | Brakes | 13.70% | 23.00% | Not set | Not set | Not set | Not set |
| 2016 to 2017 | Not set | Driver's view of the road | 5.70% | 7.40% | Not set | Not set | Not set | Not set |
| 2016 to 2017 | Not set | Driving controls | 0.70% | 0.70% | Not set | Not set | Not set | Not set |
| 2016 to 2017 | Not set | Fuel and exhaust | 2.80% | 3.00% | Not set | Not set | Not set | Not set |
| 2016 to 2017 | Not set | Lighting and signalling | 16.90% | 27.20% | Not set | Not set | Not set | Not set |
| 2016 to 2017 | Not set | Reg plates and VIN | 0.40% | 0.50% | Not set | Not set | Not set | Not set |
| 2016 to 2017 | Not set | Road wheels | 0.10% | 0.10% | Not set | Not set | Not set | Not set |
| 2016 to 2017 | Not set | Seat belts | 5.70% | 8.50% | Not set | Not set | Not set | Not set |
| 2016 to 2017 | Not set | Steering | 2.70% | 3.10% | Not set | Not set | Not set | Not set |
| 2016 to 2017 | Not set | Suspension | 7.10% | 11.80% | Not set | Not set | Not set | Not set |
| 2016 to 2017 | Not set | Towbars | 0.10% | 0.10% | Not set | Not set | Not set | Not set |
| 2016 to 2017 | Not set | Tyres | 3.70% | 4.50% | Not set | Not set | Not set | Not set |
| 2016 to 2017 | Not set | Overall Initial Failure Rate | 31.70% | - | Not set | Not set | Not set | Not set |
| 2016 to 2017 | Not set | Average defects per Initial Test Failure | - | 3.32 | Not set | Not set | Not set | Not set |
| 2015 to 2016 | Not set | Body and structure | 6.20% | 9.40% | Not set | Not set | Not set | Not set |
| 2015 to 2016 | Not set | Brakes | 12.70% | 22.70% | Not set | Not set | Not set | Not set |
| 2015 to 2016 | Not set | Driver's view of the road | 5.80% | 7.80% | Not set | Not set | Not set | Not set |
| 2015 to 2016 | Not set | Driving controls | 0.70% | 0.70% | Not set | Not set | Not set | Not set |
| 2015 to 2016 | Not set | Fuel and exhaust | 2.80% | 3.00% | Not set | Not set | Not set | Not set |
| 2015 to 2016 | Not set | Lighting and signalling | 17.30% | 28.00% | Not set | Not set | Not set | Not set |
| 2015 to 2016 | Not set | Reg plates and VIN | 0.40% | 0.40% | Not set | Not set | Not set | Not set |
| 2015 to 2016 | Not set | Road wheels | 0.10% | 0.10% | Not set | Not set | Not set | Not set |
| 2015 to 2016 | Not set | Seat belts | 5.60% | 8.50% | Not set | Not set | Not set | Not set |
| 2015 to 2016 | Not set | Steering | 3.00% | 3.40% | Not set | Not set | Not set | Not set |
| 2015 to 2016 | Not set | Suspension | 6.70% | 11.00% | Not set | Not set | Not set | Not set |
| 2015 to 2016 | Not set | Towbars | 0.10% | 0.10% | Not set | Not set | Not set | Not set |
| 2015 to 2016 | Not set | Tyres | 3.60% | 4.60% | Not set | Not set | Not set | Not set |
| 2015 to 2016 | Not set | Overall Initial Failure Rate | 31.90% | - | Not set | Not set | Not set | Not set |
| 2015 to 2016 | Not set | Average defects per Initial Test Failure | - | 3.27 | Not set | Not set | Not set | Not set |
| 2014 to 2015 | Not set | Body and structure | 6.50% | 9.50% | Not set | Not set | Not set | Not set |
| 2014 to 2015 | Not set | Brakes | 12.30% | 22.80% | Not set | Not set | Not set | Not set |
| 2014 to 2015 | Not set | Driver's view of the road | 5.80% | 7.30% | Not set | Not set | Not set | Not set |
| 2014 to 2015 | Not set | Driving controls | 0.80% | 0.80% | Not set | Not set | Not set | Not set |
| 2014 to 2015 | Not set | Fuel and exhaust | 3.20% | 3.30% | Not set | Not set | Not set | Not set |
| 2014 to 2015 | Not set | Lighting and signalling | 17.10% | 27.90% | Not set | Not set | Not set | Not set |
| 2014 to 2015 | Not set | Reg plates and VIN | 0.50% | 0.50% | Not set | Not set | Not set | Not set |
| 2014 to 2015 | Not set | Road wheels | 0.10% | 0.10% | Not set | Not set | Not set | Not set |
| 2014 to 2015 | Not set | Seat belts | 5.60% | 8.50% | Not set | Not set | Not set | Not set |
| 2014 to 2015 | Not set | Steering | 3.40% | 3.90% | Not set | Not set | Not set | Not set |
| 2014 to 2015 | Not set | Suspension | 6.80% | 10.80% | Not set | Not set | Not set | Not set |
| 2014 to 2015 | Not set | Towbars | 0.10% | 0.10% | Not set | Not set | Not set | Not set |
| 2014 to 2015 | Not set | Tyres | 3.60% | 4.30% | Not set | Not set | Not set | Not set |
| 2014 to 2015 | Not set | Overall Initial Failure Rate | 34.20% | - | Not set | Not set | Not set | Not set |
| 2014 to 2015 | Not set | Average defects per Initial Test Failure | - | 3.41 | Not set | Not set | Not set | Not set |
| 2013 to 2014 | Not set | Body and structure | 7.90% | 10.80% | Not set | Not set | Not set | Not set |
| 2013 to 2014 | Not set | Brakes | 13.10% | 22.50% | Not set | Not set | Not set | Not set |
| 2013 to 2014 | Not set | Driver's view of the road | 5.90% | 7.00% | Not set | Not set | Not set | Not set |
| 2013 to 2014 | Not set | Driving controls | 1.00% | 0.90% | Not set | Not set | Not set | Not set |
| 2013 to 2014 | Not set | Fuel and exhaust | 3.50% | 3.40% | Not set | Not set | Not set | Not set |
| 2013 to 2014 | Not set | Lighting and signalling | 17.90% | 27.70% | Not set | Not set | Not set | Not set |
| 2013 to 2014 | Not set | Reg plates and VIN | 0.60% | 0.50% | Not set | Not set | Not set | Not set |
| 2013 to 2014 | Not set | Road wheels | 0.10% | 0.10% | Not set | Not set | Not set | Not set |
| 2013 to 2014 | Not set | Seat belts | 6.10% | 8.40% | Not set | Not set | Not set | Not set |
| 2013 to 2014 | Not set | Steering | 3.70% | 3.80% | Not set | Not set | Not set | Not set |
| 2013 to 2014 | Not set | Suspension | 6.90% | 10.00% | Not set | Not set | Not set | Not set |
| 2013 to 2014 | Not set | Towbars | 0.10% | 0.10% | Not set | Not set | Not set | Not set |
| 2013 to 2014 | Not set | Tyres | 3.90% | 4.30% | Not set | Not set | Not set | Not set |
| 2013 to 2014 | Not set | Overall Initial Failure Rate | 36.10% | - | Not set | Not set | Not set | Not set |
| 2013 to 2014 | Not set | Average defects per Initial Test Failure | - | 3.48 | Not set | Not set | Not set | Not set |