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Section 4

Lamps, reflectors and electrical equipment

Headlamps, side and stop lamps, indicators, reflectors, electrical wiring.

104
defect codes in this section
6 Dangerous62 Major36 Minor
View this section on gov.uk →

4.1 Headlamps

4.2 Front and rear position lamps, daytime running lamps and end-outline marker lamps

4.3 Stop lamps

4.4 Direction indicators and hazard warning lamps

4.5 Front and rear fog lamps

4.6 Reversing lamps

4.7 Rear registration plate lamps

4.8 Rear reflectors

4.9 'Tell-tales' mandatory for lighting equipment

4.10 Trailer electrical socket

4.11 Electrical wiring

4.13 Battery(ies)

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.