By comparison with other topics, the MOT requirements relating to the exhaust system are pretty straightforward. In a nutshell, the whole system from front to back which consists of downpipes, catalytic converter, centre pipe and rear silencer, needs to be complete and in sound condition.
All mounting and support brackets should also be complete and effective. Minor corrosion of the system is not a failure item, nor are minor leaks. It should be noted however that exhaust system leaks can affect engine performance and economy and can cause MOT emissions test failure. Substantial corrosion with a risk of failure, significant leaks and clearly excessive noise could all constitute an MOT fail.
Boring but important
Although we have been very careful in the compilation of the advice pages of our website and the content is thoroughly checked by our panel of specialists, we cannot be held responsible for any loss or damage caused if you decide to follow the advice contained herein. Please bear in mind that a job which may well be a piece of cake on a vehicle lift could easily turn into a total nightmare when lying on your back in the front street in the regulation puddle. Don't tackle any work unless you are confident that you fully understand the complexity of the job you are undertaking. Make sure that you have the correct tools to hand, always wear the appropriate protection and never, ever work under an unsupported vehicle. If you are not entirely confident that you can complete the job, then it should be entrusted to a specialist.
If you feel that there are any errors on any aspect of this or other pages of our website, or if you simply wish to comment, please call Malcolm on 0191 586 7724 or send us an email