Noise, emissions and leaks: MOT defects

Every MOT defect the DVSA lists under Noise, emissions and leaks: 29 parts, 114 defects. Wording, severity and what each one means for the test. Free to read.

• Catalytic converter (Compression ignition) (3)
• Exhaust gas recirculation valve (Compression ignition) (3)
• NOx sensor (Compression ignition) (3)
• Other emission control equipment (Compression ignition) (3)
• Oxygen sensor (Compression ignition) (3)
• Particulate filter (Compression ignition) (3)
• Emissions not tested (Compression ignition) (2)
• Malfunction indicator lamp (Compression ignition) (1)
• On or after 01/01/2014 (9)
• On or after 01/07/2008 (9)
• Pre 01/01/1980 visual (1)
• Pre 01/07/2008 Non turbo (9)
• Pre 01/07/2008 Turbo (9)
• Catalyst emissions (14)
• Catalytic converter (Spark ignition) (3)
• Exhaust gas recirculation valve (Spark ignition) (3)
• NOx sensor (Spark ignition) (3)
• Other emission control equipment (Spark ignition) (3)
• Oxygen sensor (Spark ignition) (3)
• Particulate filter (Spark ignition) (3)
• Emissions not tested (Spark ignition) (2)
• Malfunction indicator lamp (Spark ignition) (1)
• Non catalyst emissions (9)
• Engine oil leaks (2)
• Hydraulic fluid leaks (2)
• Other leaks (2)
• Transmission oil leaks (2)
• Sound deadening material (2)
• Undertray (Noise suppression) (2)