Bmw 520 vs Bmw X5m: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Bmw 520
78%
MOT pass rate · 156,398 vehicles
Bmw X5m
78%
MOT pass rate · 1 vehicles
Verdict: On MOT pass rate the Bmw 520 (78%) and Bmw X5m (78%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Head to head
| Measure | Bmw 520 | Bmw X5m |
|---|---|---|
| MOT pass rate | 78% | 78% |
| MOT failure rate | 22% | 22% |
| Faults & advisories per test | 1.6 | 1.1 ✓ |
| Dangerous-fault share | 3% ✓ | 10% |
| Average mileage | 134,460 mi | 75,682 mi |
| Sample size (vehicles) | 156,398 | 1 |
Most common faults
Bmw 520
- Nearside Rear Tyre worn close to the legal limit (4.1.E.1)
- Offside Rear Tyre worn close to the legal limit (4.1.E.1)
- Offside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
- Nearside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
- Under-trays fitted obscuring some underside components
- Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
Bmw X5m
- chip in a zone
- Nearside Front Brake pad(s) wearing thin (1.1.13 (a) (ii))
- Offside Front Brake pad(s) wearing thin (1.1.13 (a) (ii))
- Offside Front chip in screen
- Nearside Rear Tyre has a cut in excess of the requirements deep enough to reach the ply or cords (5.2.3 (d) (i))
- Nearside Front Tyre has ply or cords exposed (5.2.3 (d) (ii))
Reliability FAQ
On MOT pass rate the Bmw 520 (78%) and Bmw X5m (78%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Bmw 520 report Full Bmw X5m report Most reliable cars
Pass rates are computed over completed (pass/fail) MOT tests. Reliability also depends on age, mileage and upkeep — see each model's page for the full picture.