Skip to content

Bmw 520 vs Bmw M5 phev 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
Bmw M5 phev auto
50%
MOT pass rate · 1,365 vehicles
Verdict: On MOT pass rate the Bmw 520 (78%) and Bmw M5 phev auto (50%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Head to head

Measure Bmw 520 Bmw M5 phev auto
MOT pass rate 78% ✓ 50%
MOT failure rate 22% ✓ 50%
Faults & advisories per test 1.6 ✓ 4.0
Dangerous-fault share 3% 0% ✓
Average mileage 134,460 mi 8,913 mi
Sample size (vehicles) 156,398 1,365

Most common faults

Bmw 520

  1. Nearside Rear Tyre worn close to the legal limit (4.1.E.1)
  2. Offside Rear Tyre worn close to the legal limit (4.1.E.1)
  3. Offside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  4. Nearside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  5. Under-trays fitted obscuring some underside components
  6. Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))

Bmw M5 phev auto

  1. Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  2. Nearside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  3. Offside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  4. Offside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  5. Front Registration plate does not conform to the specified requirements (0.1 (d))
  6. Rear Registration plate does not conform to the specified requirements (0.1 (d))

Reliability FAQ

On MOT pass rate the Bmw 520 (78%) and Bmw M5 phev auto (50%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Bmw 520 report Full Bmw M5 phev 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.