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Bmw 320d ed vs Bmw 520: reliability comparison

MOT pass rates, common faults and mileage compared from real UK MOT data.

Bmw 320d ed
80%
MOT pass rate · 1 vehicles
Bmw 520
78%
MOT pass rate · 156,398 vehicles
Verdict: On MOT pass rate the Bmw 320d ed (80%) and Bmw 520 (78%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Head to head

Measure Bmw 320d ed Bmw 520
MOT pass rate 80% ✓ 78%
MOT failure rate 20% ✓ 22%
Faults & advisories per test 1.4 ✓ 1.6
Dangerous-fault share 0% ✓ 3%
Average mileage 98,190 mi 134,460 mi
Sample size (vehicles) 1 156,398

Most common faults

Bmw 320d ed

  1. Offside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  2. Nearside Front Track rod end ball joint dust cover damaged or deteriorated, but preventing the ingress of dirt (2.1.3 (g) (i))
  3. Nearside Rear tyre has nail in tread
  4. Offside Rear Nail in tyre
  5. Nearside Front Nail in tyre
  6. Nearside Front Inner Brake pad(s) wearing thin (1.1.13 (a) (ii))

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))

Reliability FAQ

On MOT pass rate the Bmw 320d ed (80%) and Bmw 520 (78%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Bmw 320d ed report Full Bmw 520 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.