BMW X5 vs BMW 520 Series: MOT reliability compared
Updated 05 September 2026.
21.5%
BMW 520 Series MOT failure rate, 1.2 pts lower than BMW X5
BMW 520 Series is the more reliable MOT performer: 21.5% of BMW 520 Series MOTs fail versus 22.7% for BMW X5, a 1.2 point gap.
| Metric | BMW X5 | BMW 520 Series |
|---|---|---|
| MOT failure rate | 22.7% | 21.5% |
| Tests analysed | 1,798,830 | 1,671,688 |
| Most common failure | Brakes (27.1%) | Suspension (31.2%) |
Questions and answers
Which is more reliable, BMW X5 or BMW 520 Series?
BMW 520 Series is the more reliable MOT performer: 21.5% of BMW 520 Series MOTs fail versus 22.7% for BMW X5, a 1.2 point gap.
What is the MOT failure rate of the BMW X5?
22.7% of BMW X5 MOT tests result in a failure, from 1,798,830 tests.
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.