Guidance

Catalytic converters and diesel particulate filters

The rules that apply to the manufacture, sale and fitting of catalytic converters and diesel particulate filters.

• From: Department for Transport
• Published: 7 June 2018
• Last updated: 30 May 2023
  Show all updates

  1. 30 May 2023

     Catalytic converter guidance updated and guidance on diesel particulate filters added.

  2. 7 June 2018

     First published.

Documents

Catalytic converters and diesel particulate filters

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Details

This guidance explains the rules for catalytic converters and diesel particulate filters regarding:

• manufacturer
• sale
• fitting to vehicles