BMW M135I common problems and MOT failures
What goes wrong on a used BMW M135I, year by year: known faults from UK buying guides, the parts flagged at MOT more than on other cars (from 22,693 MOTs done during 2023–2025), and what to check before you buy one.
Pick the year
Most years have their own guide. The year is when the car was first registered (it’s on the logbook, or check the reg below).
What usually goes wrong with a BMW M135I?
We haven’t found widely reported faults for the BMW M135I in the UK buying guides we use yet. That doesn’t mean it has none, so check the car carefully and look at the MOT weak spots below.
BMW M135I MOT pass rate by year
Of the years since 2005 with plenty of MOT tests, the 2021 BMW M135I did best (91% passed first time, 4 points above all 2021 cars) and the 2022 did worst (92%, 3 points above all 2022 cars). Older cars fail more, so compare each year with all cars registered the same year.
Looking at a BMW M135I?
Check the actual car: its own MOT history and what to ask the seller. Free, no sign-up.
Where this comes from: MOT figures are the DVSA’s anonymised results for every MOT test done in Great Britain during 2023–2025, grouped by the year each car was first registered. How many are on the road is from the Department for Transport’s vehicle licensing statistics. Known faults are from UK buying guides, in our own words, with links. How we score