The exhaust system carries gases away from the engine, reduces noise and houses catalytic converters and filters on many vehicles. Defects affect noise, emissions and safety.
Common MOT issues
- Leaks before the catalytic converter or excessive corrosion
- Loose or missing mounts allowing contact with the body
- Excessive smoke indicating engine wear or turbo faults
- Noise clearly above original design levels
Petrol vs diesel
Diesel particulate filters and EGR systems add complexity. Short urban journeys can block DPFs; forced regeneration or repair may be needed before emissions pass.
Repairs at N05
We replace sections, flex pipes, gaskets and rear boxes where economical; larger jobs are quoted transparently. See exhaust pricing and book via online booking.
For related engine codes, read our diagnostics guide.
Book exhaust inspection
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Book a slot