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Bmw 520 vs Bmw 740d xdrive mhev 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 740d xdrive mhev auto
88%
MOT pass rate · 11 vehicles
Verdict: On MOT pass rate the Bmw 520 (78%) and Bmw 740d xdrive mhev auto (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 740d xdrive mhev auto
MOT pass rate 78% 88% ✓
MOT failure rate 22% 12% ✓
Faults & advisories per test 1.6 0.5 ✓
Dangerous-fault share 3% ✓ 6%
Average mileage 134,460 mi 47,742 mi
Sample size (vehicles) 156,398 11

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 740d xdrive mhev auto

  1. Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  2. Offside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  3. Engine MIL inoperative or indicates a malfunction (8.2.1.2 (h))
  4. Nearside Rear Tyre has a cut but not deep enough to reach the ply or cords (5.2.3 (d) (i))
  5. Nearside Rear Tyre tread depth below requirements of 1.6mm (5.2.3 (e))
  6. Rear Prop shaft flexible coupling slightly deteriorated small splits in rear prop coupling (6.1.7 (d) (i))

Reliability FAQ

On MOT pass rate the Bmw 520 (78%) and Bmw 740d xdrive mhev auto (88%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Bmw 520 report Full Bmw 740d xdrive mhev 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.