Patterson Diesel provides a full emission testing service.


You can’t get an MOT certificate if your vehicle’s exhaust emissions are too high. Emissions may also be tested as part of a roadside check carried out by authorised national and local bodies.

Most vehicles have their exhaust emissions tested as part of the MOT. Usually, they’re tested using a meter. Petrol vehicles used before August 1975 and diesel vehicles used before August 1979 are tested by sight. If your vehicle fails the emission test it fails the MOT. The problem must be fixed before you can get an MOT certificate.

The only vehicles that don’t have an emissions test as part of the MOT are:

  • vehicles with less than 4 wheels
  • those with 2-stroke engines
  • hybrid vehicles
  • quadricycles

Roadside Checks

Your vehicle can also be tested during a roadside check. If it fails the check, you’ll be given a prohibition notice. You’ll have 10 days to fix the problem. If you don’t fix it within this period you may be prosecuted. If your vehicle is seriously in breach of the legal emission limits, or if it has other defects which make it dangerous, the notice will come into effect immediately. You won’t be able to use the vehicle. You may also be prosecuted.

Air Quality Management Areas

A number of councils have been designated ‘Air Quality Management Areas’. This means the council can test vehicles at the roadside and issue fixed penalties to drivers whose vehicles fail.

Fully Approved By Bosch and Delphi

As a Bosch Diesel Center we are part of the international diesel workshop organisation of Bosch, the leading supplier of modern diesel technology and No. 1 in development and original equipment of Diesel Systems.

Delphi Service Centres are a network of independent garages around the world. Each garage benefits from Delphi’s comprehensive offering of parts, tools, diagnostics, training and technical support. Delphi provides valuable knowledge of the technology the market will see in cars today, tomorrow … and ten years down the road.

Patterson Diesel are also the appointed main agents for Denso, Stanadyne and Zexel.

Please contact us for more details about our Emissions Testing Service.

Patterson Diesel  – Appointed Main Agents For –

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