Affects dpf's, Euro5 diesels, aftermarket HID bulbs, etc. Reversing light operation included in test. See https://www.honestjohn.co.uk/news/legal-motoring-advice/2018-02/new-mot-test-will-clamp-down-on-dirty-diesels/?utm_medium=email&utm_campaign=Newsletter 01 March 2018 Good Garages Special&utm_content=Newsletter 01 March 2018 Good Garages Special+Version+A+CID_ce77f0dbd1149143ca6decf34de5a224&utm_source=campaign monitor&utm_term=Click here to read about the MoT changes 201