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Fiat 500 vs Fiat Auto sleeper: reliability comparison

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

Fiat 500
77%
MOT pass rate · 333,596 vehicles
Fiat Auto sleeper
82%
MOT pass rate · 2 vehicles
Verdict: On MOT pass rate the Fiat 500 (77%) and Fiat Auto sleeper (82%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Head to head

Measure Fiat 500 Fiat Auto sleeper
MOT pass rate 77% 82% ✓
MOT failure rate 23% 18% ✓
Faults & advisories per test 2.0 1.3 ✓
Dangerous-fault share 3% 0% ✓
Average mileage 62,906 mi 35,230 mi
Sample size (vehicles) 333,596 2

Most common faults

Fiat 500

  1. Offside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  2. Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  3. Offside Rear Tyre slightly damaged/cracking or perishing (5.2.3 (d) (ii))
  4. Front Brake disc worn, pitted or scored, but not seriously weakened (1.1.14 (a) (ii))
  5. Nearside Rear Tyre slightly damaged/cracking or perishing (5.2.3 (d) (ii))
  6. Nearside Rear Coil spring corroded (5.3.1 (b) (i))

Fiat Auto sleeper

  1. Nearside Front Tyre worn close to legal limit/worn on edge on 2mm + worn on inner edge (5.2.3 (e))
  2. Offside Front Tyre worn close to legal limit/worn on edge on 1.6mm + worn on inner edge (5.2.3 (e))
  3. Nearside Rear Brake pad(s) wearing thin (1.1.13 (a) (ii))
  4. Nearside Rear Service brake binding but not excessively (1.2.1 (f))
  5. Offside Play in steering rack inner joint(s)
  6. Offside Rear Brake pad(s) wearing thin (1.1.13 (a) (ii))

Reliability FAQ

On MOT pass rate the Fiat 500 (77%) and Fiat Auto sleeper (82%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Fiat 500 report Full Fiat Auto sleeper 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.