BMW M4 MOT Failures
An analysis of 137,940 real DVSA MOT tests on the BMW M4 — what fails, how often, and how that compares to every other car on UK roads.
Where the BMW M4 fails its MOT
The single biggest MOT failure point on the BMW M4 is window tint too dark — this model is 31 times more likely to fail on this item than the average car on UK roads. That makes it a significant weak point for anyone buying or owning this model. Across 137,940 MOT tests, 0.3% of all BMW M4 tests recorded this as a failure.
Other notable weak points include tyre cords visible or damaged (7.8x the fleet average), emissions failure (43x the fleet average), tyre fouling a part of the vehicle (10x the fleet average), and exhaust system damage (9.5x the fleet average). These ratios compare the BMW M4's failure rate on each item against the national average for all cars tested — a ratio of 10x means this model fails ten times more often than a typical car.
The failures span 4 categories: Wipers & Windscreen, Tyres, Exhaust & Emissions, Bodywork. If you're inspecting a BMW M4 before purchase, these are the areas to focus on — and if any have been flagged as advisories on a previous MOT, they're likely to become failures in the near future.
What to check before buying a BMW M4
Based on the MOT failure data and known issues above, here's what to prioritise when inspecting a BMW M4:
Wipers & Windscreen — check for window tint too dark. Tyres — check for tyre cords visible or damaged, tyre fouling a part of the vehicle. Exhaust & Emissions — check for emissions failure, fluid leak.
Always check the car's full MOT history for patterns — recurring advisories often become failures within 12 months. Enter any reg into our free car check to see the complete picture.
Looking at a specific BMW M4?
Enter the reg to see its full MOT history, mileage records, write-off status, and finance checks.
BMW M4 MOT FAQs
What are the most common MOT failures on a BMW M4?
Based on 137,940 DVSA MOT tests, the most common failure is window tint too dark — at 31x the national fleet average. Other frequent failures include tyre cords visible or damaged and emissions failure.
Is the BMW M4 reliable based on MOT data?
The BMW M4 has 6 categories where it fails more often than average. The main concern is window tint too dark. Always check a specific car's full history before buying.
What MOT failures should I expect at high mileage?
The most common high-mileage failures include window tint too dark, tyre cords visible or damaged, emissions failure.
How do I check a BMW M4's MOT history?
Enter the registration number into our free car check above. You'll see every MOT test result, advisories and failures, mileage readings, write-off status, and finance checks.
MOT failure data sourced from DVSA bulk test records via data.gov.uk. Ratios compare this model's failure rate against the national fleet average. Known issues sourced from manufacturer bulletins, specialist workshops, and verified owner reports.