MOTScout

Issues with exhaust, fuel and emissions

major

What Does This Mean?

Exhaust system integrity, catalytic converter, emissions levels. Diesel particulate filters (DPF) also checked.

How to Fix It

Fix exhaust leaks, replace catalytic converter or DPF if blocked. An engine service before MOT can help reduce emissions.

Most Affected Makes

Percentage of All Failures

4.9%

2,100,000 failures in 2023

Estimated Repair Cost

£50 – £1,000