Section 8
Nuisance
Exhaust emissions, noise, fluid leaks.
25
defect codes in this section
3 Dangerous22 Major
8.1 Noise
8.2.1 Spark ignition engine emissions
8.2.1.1.aExhaust emission control equipmentSpark ignition engine emissionsMajor8.2.1.1.bExhaust emission control equipmentSpark ignition engine emissionsMajor8.2.1.2.aGaseous emissionsSpark ignition engine emissionsMajor8.2.1.2.bGaseous emissionsSpark ignition engine emissionsMajor8.2.1.2.cGaseous emissionsSpark ignition engine emissionsMajor8.2.1.2.dGaseous emissionsSpark ignition engine emissionsMajor8.2.1.2.eGaseous emissionsSpark ignition engine emissionsMajor8.2.1.2.fGaseous emissionsSpark ignition engine emissionsMajor8.2.1.2.gGaseous emissionsSpark ignition engine emissionsMajor8.2.1.2.hGaseous emissionsSpark ignition engine emissionsMajor
8.2.2 Compression ignition engine emissions
8.2.2.1.aExhaust emission control equipmentCompression ignition engine emissionsMajor8.2.2.1.bExhaust emission control equipmentCompression ignition engine emissionsMajor8.2.2.1.cExhaust emission control equipmentCompression ignition engine emissionsMajor8.2.2.2.aOpacityCompression ignition engine emissionsMajor8.2.2.2.bOpacityCompression ignition engine emissionsMajor8.2.2.2.cOpacityCompression ignition engine emissionsDangerous8.2.2.2.dOpacityCompression ignition engine emissionsMajor8.2.2.2.eOpacityCompression ignition engine emissionsMajor8.2.2.2.fOpacityCompression ignition engine emissionsMajor8.2.2.2.gOpacityCompression ignition engine emissionsMajor
8.4 Other environmental items
motfailcode.uk maps DVSA MOT defect codes to plain-English meanings. Defect severity classifications follow the DVSA MOT Inspection Manual current as of 12 May 2026. Codes and severities are updated annually (typically May). Always confirm with a qualified MOT tester or vehicle technician for your specific vehicle. This site is not affiliated with DVSA or HM Government.
See our methodology for how we extract and verify each code, and sources for the full citation manifest.