4.1.4.b
Compliance with requirements · Headlamps
Major · Rectify before re-test.
Product on the lens or light source which obviously reduces light intensity or changes emitted colour to other than white or yellow
DVSA manual phrasing — written for testers, kept verbatim.
May affect the vehicle's safety, put other road users at risk, or have an impact on the environment. The vehicle has failed the MOT.
Compliance with requirements
- Section 4
- Lamps, reflectors and electrical equipment
- 4.1
- Headlamps
- 4.1.4
- Compliance with requirements
- 4.1.4.b
- this defect
Rectify before re-test.
Always confirm with a qualified MOT tester or vehicle technician for your specific vehicle. A re-test must address the defect category identified above.
Related codes in this subject
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.