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Bmw 100t vs Bmw 520: reliability comparison

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

Bmw 100t
83%
MOT pass rate · 2 vehicles
Bmw 520
78%
MOT pass rate · 156,398 vehicles
Verdict: On MOT pass rate the Bmw 100t (83%) 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 100t Bmw 520
MOT pass rate 83% ✓ 78%
MOT failure rate 17% ✓ 22%
Faults & advisories per test 0.8 ✓ 1.6
Dangerous-fault share 0% ✓ 3%
Average mileage 51,824 mi 134,460 mi
Sample size (vehicles) 2 156,398

Most common faults

Bmw 100t

  1. An item not tested (Manual)
  2. Rear Stop lamp remains on when the brake is released (1.3.1e)
  3. Stop lamp remains on when the brake is released (1.3.1e)
  4. Brake hose slightly deteriorated (3.2.B3b)
  5. Front brake operation slightly spongy
  6. Nearside Inner Brake pad(s) close to minimum limit (3.2.A1f(i))

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 100t (83%) and Bmw 520 (78%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Bmw 100t 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.