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Audi A1 vs Audi A4 s line 30 tdi mhev s-a: 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 line 30 tdi mhev s-a
85%
MOT pass rate · 81 vehicles
Verdict: On MOT pass rate the Audi A1 (84%) and Audi A4 s line 30 tdi mhev s-a (85%) 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 line 30 tdi mhev s-a
MOT pass rate 84% 85% ✓
MOT failure rate 16% 15% ✓
Faults & advisories per test 1.5 1.1 ✓
Dangerous-fault share 5% ✓ 7%
Average mileage 67,791 mi 63,467 mi
Sample size (vehicles) 235,482 81

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 line 30 tdi mhev s-a

  1. Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  2. Front Brake pad(s) wearing thin (1.1.13 (a) (ii))
  3. Offside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  4. Rear Brake pad(s) wearing thin (1.1.13 (a) (ii))
  5. Nearside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  6. Offside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))

Reliability FAQ

On MOT pass rate the Audi A1 (84%) and Audi A4 s line 30 tdi mhev s-a (85%) 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 line 30 tdi mhev s-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.