Skip to content

Audi A1 vs Audi A4 s ln black ed 30tdi mhev sa: reliability comparison

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

Audi A1
84%
MOT pass rate · 235,482 vehicles
Audi A4 s ln black ed 30tdi mhev sa
88%
MOT pass rate · 66 vehicles
Verdict: On MOT pass rate the Audi A1 (84%) and Audi A4 s ln black ed 30tdi mhev sa (88%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Head to head

Measure Audi A1 Audi A4 s ln black ed 30tdi mhev sa
MOT pass rate 84% 88% ✓
MOT failure rate 16% 12% ✓
Faults & advisories per test 1.5 1.0 ✓
Dangerous-fault share 5% ✓ 14%
Average mileage 67,791 mi 55,281 mi
Sample size (vehicles) 235,482 66

Most common faults

Audi A1

  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. Rear Brake disc worn, pitted or scored, but not seriously weakened (1.1.14 (a) (ii))
  4. Offside Rear Tyre slightly damaged/cracking or perishing (5.2.3 (d) (ii))
  5. Nearside Rear Tyre slightly damaged/cracking or perishing (5.2.3 (d) (ii))
  6. Nearside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))

Audi A4 s ln black ed 30tdi mhev sa

  1. Offside Front 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. Nearside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  4. Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  5. Windscreen damaged but not adversely affecting driver's view (3.2 (a) (i))
  6. Rear Brake pad(s) wearing thin (1.1.13 (a) (ii))

Reliability FAQ

On MOT pass rate the Audi A1 (84%) and Audi A4 s ln black ed 30tdi mhev sa (88%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Audi A1 report Full Audi A4 s ln black ed 30tdi mhev sa 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.