BMW 520 Series vs BMW X3: MOT reliability compared
Updated 05 September 2026.
17.9%
BMW X3 MOT failure rate, 3.6 pts lower than BMW 520 Series
BMW X3 is the more reliable MOT performer: 17.9% of BMW X3 MOTs fail versus 21.5% for BMW 520 Series, a 3.6 point gap.
| Metric | BMW 520 Series | BMW X3 |
|---|---|---|
| MOT failure rate | 21.5% | 17.9% |
| Tests analysed | 1,671,688 | 1,310,087 |
| Most common failure | Suspension (31.2%) | Tyres (26.0%) |
Questions and answers
Which is more reliable, BMW 520 Series or BMW X3?
BMW X3 is the more reliable MOT performer: 17.9% of BMW X3 MOTs fail versus 21.5% for BMW 520 Series, a 3.6 point gap.
What is the MOT failure rate of the BMW 520 Series?
21.5% of BMW 520 Series MOT tests result in a failure, from 1,671,688 tests.
What is the MOT failure rate of the BMW X3?
17.9% of BMW X3 MOT tests result in a failure, from 1,310,087 tests.