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Bmw 520 vs Bmw I4 edrive35 sport: 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 I4 edrive35 sport
95%
MOT pass rate · 2,767 vehicles
Verdict: On MOT pass rate the Bmw 520 (78%) and Bmw I4 edrive35 sport (95%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Head to head

Measure Bmw 520 Bmw I4 edrive35 sport
MOT pass rate 78% 95% ✓
MOT failure rate 22% 5% ✓
Faults & advisories per test 1.6 0.2 ✓
Dangerous-fault share 3% 0% ✓
Average mileage 134,460 mi 20,032 mi
Sample size (vehicles) 156,398 2,767

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 I4 edrive35 sport

  1. Nearside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  2. Offside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  3. Offside Rear Inner Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  4. Nearside Front Headlamp aim too high (4.1.2 (a))
  5. Nearside Front Tyre(s) of different sizes are fitted on the same axle. Wrong tyre size fitted (5.2.3 (b))
  6. Nearside Rear Tyre has a cut in excess of the requirements deep enough to reach the ply or cords (5.2.3 (d) (i))

Reliability FAQ

On MOT pass rate the Bmw 520 (78%) and Bmw I4 edrive35 sport (95%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Bmw 520 report Full Bmw I4 edrive35 sport 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.