Skip to content

Audi A4 vs Audi S3 quattr: reliability comparison

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

Audi A4
76%
MOT pass rate · 568,515 vehicles
Audi S3 quattr
82%
MOT pass rate · 5 vehicles
Verdict: On MOT pass rate the Audi A4 (76%) and Audi S3 quattr (82%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Head to head

Measure Audi A4 Audi S3 quattr
MOT pass rate 76% 82% ✓
MOT failure rate 24% 18% ✓
Faults & advisories per test 1.9 1.0 ✓
Dangerous-fault share 2% 0% ✓
Average mileage 133,841 mi 76,879 mi
Sample size (vehicles) 568,515 5

Most common faults

Audi A4

  1. Nearside Front Tyre worn close to the legal limit (4.1.E.1)
  2. Offside Front Tyre worn close to the legal limit (4.1.E.1)
  3. Nearside Rear Tyre worn close to the legal limit (4.1.E.1)
  4. Offside Rear Tyre worn close to the legal limit (4.1.E.1)
  5. Under-trays fitted obscuring some underside components
  6. Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))

Audi S3 quattr

  1. Front brake disc worn, pitted or scored, but not seriously weakened (3.5.1i)
  2. Nearside Front constant velocity joint gaiter deteriorated (2.5.C.1a)
  3. Nail in nearside rear tyre
  4. Nail in offside rear tyre
  5. Front Brake pad(s) wearing thin (3.5.1g)
  6. Windscreen has damage to an area less than a 10mm circle within zone 'A' (8.3.1a)

Reliability FAQ

On MOT pass rate the Audi A4 (76%) and Audi S3 quattr (82%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Audi A4 report Full Audi S3 quattr 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.