Common problems by part
Infiniti Q50 lights and electrics problems
DVSA MOT tests 2022–2025 · 2,281 MOT tests · Updated
At 8 years, 4.9 in 100 MOT tests of the Infiniti Q50 failed on lights and electrics, against 7.3 for all class 4 vehicles the same age (all test years; 2,281 MOT tests) [1].
Buying Report £14.99 incl. VAT · one car · no subscription · Not a mechanical inspection.
- Against all class 4 vehicles the same age: about average for all class 4 vehicles the same age (all test years), 111 MOT tests with a fail
- By age: seen at 5 ages from 6 to 10 years, 8,734 MOT tests
- Most common fail: Registration plate lamp(s): inoperative in the case of a single lamp or all lamps, 0.9 per 100 MOT tests
Figures are for the model as a whole, not for one car.
What the MOT tests show
What we know
4.9 fails per 100 MOT tests at 8 years, against 7.3 for all class 4 vehicles tested at 8 (all test years). That is about average.
Why it matters
A lights and electrics fail stops the car passing until it is fixed; the most common one is rated major by DVSA.
What to check
Walk round with the lights, indicators, brake lights and hazards on (ask someone to press the pedal) and check every dashboard warning light goes out after starting.
Infiniti Q50 lights and electrics fails by age
| Age | MOT tests | Fails per 100 | All class 4 vehicles the same age |
|---|---|---|---|
| 6 | 1,389 | 2.7 | 4.7 |
| 7 | 2,117 | 3.2 | 5.8 |
| 8 | 2,281 | 4.9 | 7.3 |
| 9 | 1,790 | 6.5 | 9.2 |
| 10 | 1,157 | 8.6 | 11.2 |
All first-use years of the Infiniti Q50 pooled at each age, against all class 4 vehicles at that age over all 2022–2025 test years.
What fails in the lights and electrics at 8 years
Fails
- Registration plate lamp(s): inoperative in the case of a single lamp or all lamps: 0.9 fails per 100 MOT tests, all class 4 vehicles 0.8. Replace exterior lamp bulb (position, stop, indicator, fog, reverse, number plate): estimated £11–£47 (0.1–0.5 h at £78/h (ONS local-garage repair quotes, 1,058 quotes from 65 garages, Sep 2025 to Aug 2026) + parts £3–£8) Registration plate lamp inoperative in the case of a single lamp or all lamps MOT fail
- Side/position light not working: 0.9 fails per 100 MOT tests, all class 4 vehicles 1.2. Replace exterior lamp bulb (position, stop, indicator, fog, reverse, number plate): estimated £11–£47 (0.1–0.5 h at £78/h (ONS local-garage repair quotes, 1,058 quotes from 65 garages, Sep 2025 to Aug 2026) + parts £3–£8) Position lamp not working MOT fail
Advisories (not fails)
- Registration plate lamp(s): inoperative in the case of multiple lamps or light sources: 1.8 advisories per 100 MOT tests, all class 4 vehicles 1.9. Registration plate lamp inoperative in the case of multiple lamps or light sources (MOT minor defect)
Replace exterior lamp bulb (position, stop, indicator, fog, reverse, number plate) cost
Repair figures are estimates, not quotes: how we estimate repair costs.
Buying an Infiniti Q50? Check that exact car before the viewing.
Buying Report £14.99 incl. VAT · one car · no subscription · Not a mechanical inspection.
- Model risks for this year and fuel
- What similar cars did at their next MOT
- Repairs ahead
- Viewing checklist
How to check on a test drive
Walk round with the lights, indicators, brake lights and hazards on (ask someone to press the pedal) and check every dashboard warning light goes out after starting.
The most common advisory here in MOT records: Registration plate lamp(s): inoperative in the case of multiple lamps or light sources.
Check one Infiniti Q50, not the average
The figures here describe Infiniti Q50 cars as a group. These free tools answer for one car. Each line says what the tool reads.
- Check an Infiniti Q50's MOT history Every MOT test, fail item, advisory and mileage reading DVSA holds for that registration.
- MOT advisory checker Paste an advisory or defect to read DVSA's wording, its grade and what tends to happen at the next MOT.
Other Infiniti Q50 problems
Lights and electrics on rival models
- Mercedes-Benz C-Class lights and electrics problems: 2.6 per 100 MOT tests at 8 years, against 4.9 for the Infiniti Q50 (140,055 MOT tests)
- BMW 3 Series lights and electrics problems: 6.0 per 100 MOT tests at 8 years, against 4.9 for the Infiniti Q50 (128,164 MOT tests)
- Vauxhall Insignia lights and electrics problems: 7.8 per 100 MOT tests at 8 years, against 4.9 for the Infiniti Q50 (94,707 MOT tests)
Questions people ask
Does the Infiniti Q50 have more lights and electrics problems than other cars?
4.9 in 100 MOT tests at 8 years, against 7.3 for all class 4 vehicles the same age: about average by our test (all test years; 2,281 MOT tests).
How common are Infiniti Q50 lights and electrics problems?
4.9 in 100 MOT tests at 8 years failed on lights and electrics, against 7.3 for all class 4 vehicles the same age (all test years; 2,281 MOT tests).
What is the most common Infiniti Q50 lights and electrics fail?
0.9 in 100 MOT tests at 8 years: Registration plate lamp(s): inoperative in the case of a single lamp or all lamps (20 MOT tests with it).
Sources
- Driver and Vehicle Standards Agency, Anonymised MOT tests and results, 2022 to 2025. DVSA MOT data, Open Government Licence v3.0, 8,734 MOT tests. Accessed 7 Oct 2026.
- Office for National Statistics, Consumer price inflation, local price quotes (car repair items). ONS price quotes, series 610236. Accessed 7 Oct 2026.
Parts: against all class 4 vehicles at the same age, all 2022–2025 test years pooled, not adjusted for mileage. Breakdowns and non-MOT faults are not in this data. How we compare