Bmw 520 vs Bmw Rg1150: 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 Rg1150
88%
MOT pass rate · 1 vehicles
Verdict: On MOT pass rate the Bmw 520 (78%) and Bmw Rg1150 (88%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Head to head
| Measure | Bmw 520 | Bmw Rg1150 |
|---|---|---|
| MOT pass rate | 78% | 88% ✓ |
| MOT failure rate | 22% | 12% ✓ |
| Faults & advisories per test | 1.6 | 0.9 ✓ |
| Dangerous-fault share | 3% ✓ | 20% |
| Average mileage | 134,460 mi | 38,698 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 Rg1150
- Front Tyre worn close to the legal limit (4.1.3(ii))
- Front Brake indicates slight fluctuation of brake effort (1.2.1 (e))
- Nearside Front Brake disc(s) slightly pitted (3.2.A1l)
- Stop lamp remains on when the brake is released (1.3.1e)
- Front Roller brake test indicates slight fluctuation of brake effort (3.3.A1d)
- Front Tyre worn close to the legal limit 110/80/19 (5.2.3 (e))
Reliability FAQ
On MOT pass rate the Bmw 520 (78%) and Bmw Rg1150 (88%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Bmw 520 report Full Bmw Rg1150 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.