BMW I8 MOT Failures
An analysis of 2,979 real DVSA MOT tests on the BMW I8 — what fails, how often, and how that compares to every other car on UK roads.
Where the BMW I8 fails its MOT
The single biggest MOT failure point on the BMW I8 is transmission shaft constant velocity joint boot... — this model is 8.9 times more likely to fail on this item than the average car on UK roads. That makes it worth watching for anyone buying or owning this model. Across 2,979 MOT tests, 4.42% of all BMW I8 tests recorded this as a failure.
Bodywork failures usually mean structural corrosion — not cosmetic rust, but rot that affects the car's structural integrity. Check sills, subframes, and chassis rails carefully, especially on older examples.
How failures change with mileage
The BMW I8'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.
The standout failure at this mileage is transmission shaft constant velocity joint boot... at 6.5x the fleet average.
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 transmission shaft constant velocity joint boot... at 8.9x the fleet average.
What to check before buying a BMW I8
Based on the MOT failure data and known issues above, here's what to prioritise when inspecting a BMW I8:
Bodywork — check for transmission shaft constant velocity joint boot....
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 I8?
Enter the reg to see its full MOT history, mileage records, write-off status, and finance checks.
BMW I8 MOT FAQs
What are the most common MOT failures on a BMW I8?
Based on 2,979 DVSA MOT tests, the most common failure is transmission shaft constant velocity joint boot... — at 9x the national fleet average.
Is the BMW I8 reliable based on MOT data?
The BMW I8 has 1 categories where it fails more often than average. The main concern is transmission shaft constant velocity joint boot.... 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 transmission shaft constant velocity joint boot....
How do I check a BMW I8'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.