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Audi A3 vs Audi A4 sport 35 tfsi mhev: reliability comparison

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

Audi A3
78%
MOT pass rate · 586,036 vehicles
Audi A4 sport 35 tfsi mhev
91%
MOT pass rate · 32 vehicles
Verdict: On MOT pass rate the Audi A3 (78%) and Audi A4 sport 35 tfsi mhev (91%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Head to head

Measure Audi A3 Audi A4 sport 35 tfsi mhev
MOT pass rate 78% 91% ✓
MOT failure rate 22% 9% ✓
Faults & advisories per test 1.8 1.1 ✓
Dangerous-fault share 3% ✓ 4%
Average mileage 112,882 mi 45,849 mi
Sample size (vehicles) 586,036 32

Most common faults

Audi A3

  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. Nearside Front Tyre worn close to the legal limit (4.1.E.1)
  4. Offside Front Tyre worn close to the legal limit (4.1.E.1)
  5. Nearside Rear Tyre worn close to the legal limit (4.1.E.1)
  6. Offside Rear Tyre worn close to the legal limit (4.1.E.1)

Audi A4 sport 35 tfsi mhev

  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. Rear Brake pad(s) wearing thin (1.1.13 (a) (ii))
  4. Offside Front Brake disc worn, pitted or scored, but not seriously weakened (1.1.14 (a) (ii))
  5. Nearside Rear Shock absorbers has a serious fluid leak (5.3.2 (b))
  6. Offside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))

Reliability FAQ

On MOT pass rate the Audi A3 (78%) and Audi A4 sport 35 tfsi mhev (91%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Audi A3 report Full Audi A4 sport 35 tfsi mhev 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.