In-service exhaust emission standards for road vehicles
A booklet about the procedures used to check vehicle exhaust emissions during an MOT and roadside checks.
PDF, 817KB, 222 pages
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This booklet explains the vehicle exhaust emissions check procedures testers and vehicle examiners use during MOT tests and roadside checks.
It also contains emissions limits for vehicles fitted with advanced emissions control systems, such as 3-way catalytic converters, and offers general advice to motorists and vehicle operators on submitting vehicles for test.
The booklet deals with petrol and diesel vehicles separately.