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Bmw 520 vs Bmw X6 m competition first ed a: 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 X6 m competition first ed a
100%
MOT pass rate · 6 vehicles
Verdict: On MOT pass rate the Bmw 520 (78%) and Bmw X6 m competition first ed a (100%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Head to head

Measure Bmw 520 Bmw X6 m competition first ed a
MOT pass rate 78% 100% ✓
MOT failure rate 22% 0% ✓
Faults & advisories per test 1.6 0.7 ✓
Dangerous-fault share 3% 0% ✓
Average mileage 134,460 mi 16,347 mi
Sample size (vehicles) 156,398 6

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 X6 m competition first ed a

  1. under trays fitted
  2. Front both front tyres inner edges wearing

Reliability FAQ

On MOT pass rate the Bmw 520 (78%) and Bmw X6 m competition first ed a (100%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Bmw 520 report Full Bmw X6 m competition first ed a 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.