2021 BMW M135i Xdrive Auto: MOT pass rate and reliability

90.6% of 2021 BMW M135i Xdrive Autos pass the MOT first time, measured across 3,488 DVSA tests on that model year alone. The average one had covered 24,990 miles.

How the 2021 compares

  • Against all BMW M135i Xdrive Autos (91%, 8,114 tests): -0.4 points
  • Against all 2021 cars (90%): +0.6 points
  • National first-time pass rate, all cars and years: 77%

Every BMW M135i Xdrive Auto model year

Pass rates fall as cars age, so the only fair comparison for a 2021 car is other cars of the same age. The full run for the BMW M135i Xdrive Auto:

Year Pass rate Tests Avg mileage
2019 90.2% 912 34,756
2020 91.1% 3,498 30,250
2021 90.6% 3,488 24,990
2022 97.2% 216 18,917

What this means if you are buying a 2021 M135i Xdrive Auto

The 2021 sits close to the BMW M135i Xdrive Auto average, so there is no strong model-year signal either way. Judge the individual car on its own history. Check the exact car with the free MOT history checker before you buy, and run its VIN and mileage through our free VIN decoder and clocking check.

What a 5-year-old car fails on

A 2021 car is 5 years old now, and age drives the failure mix more than the badge does. Across all cars tested, these are the categories that actually cause failures:

  • Lights and electrical: 10.36% of all cars tested
  • Suspension: 8.65% of all cars tested
  • Tyres: 6.23% of all cars tested
  • Brakes: 6.1% of all cars tested
  • Visibility: wipers, washers, glass: 4.65% of all cars tested
  • Body, chassis and structure: 3.18% of all cars tested

That is low mileage, which usually means light urban use. Short journeys are harder on batteries, brakes and exhausts than motorway miles, so do not assume low miles means low wear. On a 2021 BMW M135i Xdrive Auto the average at test was 24,990 miles, so treat anything far above that as a car that has worked harder than its peers, and anything far below as one worth checking for the faults that come from standing still.

The strongest year for this model is 2022 at 97.2%, and the weakest in our data is 2019 at 90.2%. That 7.0 point spread across the model's life is why comparing a 2021 car against a newer one tells you very little.

Nearby model years

All BMW M135i Xdrive Auto MOT data · Every model