Bmw 520 vs Bmw 525i se auto: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Bmw 520
78%
MOT pass rate · 156,398 vehicles
More reliable
Bmw 525i se auto
71%
MOT pass rate · 440 vehicles
Verdict: On MOT pass rate, the Bmw 520 is the more reliable of the two — 78% pass first time versus 71%. It's one signal among several; check the full breakdown below.
Head to head
| Measure | Bmw 520 | Bmw 525i se auto |
|---|---|---|
| MOT pass rate | 78% ✓ | 71% |
| MOT failure rate | 22% ✓ | 29% |
| Faults & advisories per test | 1.6 | 0.0 ✓ |
| Dangerous-fault share | 3% | — ✓ |
| Average mileage | 134,460 mi | 133,684 mi |
| Sample size (vehicles) | 156,398 | 440 |
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 525i se auto
No fault breakdown available.
Reliability FAQ
On MOT pass rate, the Bmw 520 is the more reliable of the two — 78% pass first time versus 71%. It's one signal among several; check the full breakdown below.
Full Bmw 520 report Full Bmw 525i se auto 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.