BMW M6 MOT Failures
An analysis of 2,611 real DVSA MOT tests on the BMW M6 — what fails, how often, and how that compares to every other car on UK roads.
Where the BMW M6 fails its MOT
The single biggest MOT failure point on the BMW M6 is headlight fault — this model is 42 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 2,611 MOT tests, 1.41% of all BMW M6 tests recorded this as a failure.
Lighting faults are usually straightforward to fix (bulbs, connectors, earth points) but can indicate deeper wiring issues on older cars. Check all lights including fog lamps, number plate lights, and dashboard warning lights.
Other notable weak points include fluid leak (8.2x the fleet average) and emissions failure (5.8x the fleet average). These ratios compare the BMW M6'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 2 categories: Lights & Electrics, Exhaust & Emissions. If you're inspecting a BMW M6 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.
How failures change with mileage
The BMW M6's weak points shift as the car covers more miles. Understanding these patterns helps you know what to expect — and what to budget for — at each stage of ownership.
Under 60,000 miles
At this mileage, most failures are either design-related or caused by age rather than wear. Components like bushes and drop links may not have been replaced yet, and original-fit parts can deteriorate even on low-mileage cars that spend a lot of time sitting.
For the BMW M6 specifically, the DVSA data shows the most common failures at this mileage are headlight fault (42x the average) and emissions failure (5.8x).
60,000 to 100,000 miles
This is where routine wear items start to show up. Brake components, tyres, and exhaust parts have done serious work by this point. Cars that have been well serviced will show fewer of these failures — this mileage band is where good maintenance really separates the well-kept from the neglected.
The standout failure at this mileage is fluid leak at 8.2x the fleet average.
The shift from headlight fault at lower mileages to fluid leak at higher mileages is typical — early failures tend to be design or factory-related, while high-mileage failures reflect accumulated mechanical wear. A car that's been well maintained will usually dodge the worst of both.
What to check before buying a BMW M6
Based on the MOT failure data and known issues above, here's what to prioritise when inspecting a BMW M6:
Lights & Electrics — check for headlight fault. Exhaust & Emissions — check for fluid leak, emissions failure.
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 M6?
Enter the reg to see its full MOT history, mileage records, write-off status, and finance checks.
BMW M6 MOT FAQs
What are the most common MOT failures on a BMW M6?
Based on 2,611 DVSA MOT tests, the most common failure is headlight fault — at 42x the national fleet average. Other frequent failures include fluid leak and emissions failure.
Is the BMW M6 reliable based on MOT data?
The BMW M6 has 3 categories where it fails more often than average. The main concern is headlight fault. 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 headlight fault, fluid leak, emissions failure.
How do I check a BMW M6'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.