BMW M135I MOT reliability

BMW M135Is passed their MOT first time 90% of the time across 10,142 tests in 2025.

First-time pass rate

90%

MOTs analysed

10,142

Still licensed (GB)

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Body type

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Pass rate by year of first registration

Older cars fail more often, so compare a car with others of the same age. Years with very few MOTs can show extreme pass rates, even 0% or 100%, so give more weight to years with more tests.

In detail:

First registered

2021 petrol

3,316 MOTs

Passed first time 91%. Typical mileage 30,911 (most between 23,785 and 39,433).

2022: 100% → 2023: 96% → 2024: 90% → 2025: 91%

Most common failures

Condition: has a cut in excess of the requirements deep enough to reach the ply or cords (1.8%)
Condition: has a bulge, caused by separation or partial failure of its structure (1.3%)
Tread depth below requirements of 1.6mm (1.2%)
Condition: has ply or cords exposed (0.8%)
Brake pads: less than 1.5 mm thick (0.5%)

Where 2021 M135Is fail

Wheels & tyres

5.4%

Lights & electrics

1.3%

Brakes

0.7%

Visibility & wipers

0.7%

Suspension & axles

0.6%

Body, structure & corrosion

0.1%

Exhaust, emissions & leaks

0.1%

Seat belts & other equipment

0.1%

Looking at a particular car?

See its own MOT history, mileage and red flags, compared with these figures. Free.

Based on 2025 initial MOT tests in DVSA's anonymised MOT dataset (cars and light vans). Contains public sector information licensed under the Open Government Licence v3.0. Model details: Vehicle data by VehiclesDB.