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Audi A3 s line vor 40 tfsi quat s-a vs Audi A4: reliability comparison

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

Audi A3 s line vor 40 tfsi quat s-a
88%
MOT pass rate · 21 vehicles
Audi A4
76%
MOT pass rate · 568,515 vehicles
Verdict: On MOT pass rate the Audi A3 s line vor 40 tfsi quat s-a (88%) and Audi A4 (76%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Head to head

Measure Audi A3 s line vor 40 tfsi quat s-a Audi A4
MOT pass rate 88% ✓ 76%
MOT failure rate 12% ✓ 24%
Faults & advisories per test 0.7 ✓ 1.9
Dangerous-fault share 10% 2% ✓
Average mileage 25,712 mi 133,841 mi
Sample size (vehicles) 21 568,515

Most common faults

Audi A3 s line vor 40 tfsi quat s-a

  1. Front Brake disc worn, pitted or scored, but not seriously weakened (1.1.14 (a) (ii))
  2. Front Brake pad(s) wearing thin (1.1.13 (a) (ii))
  3. Rear Brake disc worn, pitted or scored, but not seriously weakened (1.1.14 (a) (ii))
  4. Rear Brake pad(s) wearing thin (1.1.13 (a) (ii))
  5. Offside Rear Tyre has a cut but not deep enough to reach the ply or cords Outer side wall (5.2.3 (d) (i))
  6. Offside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))

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))

Reliability FAQ

On MOT pass rate the Audi A3 s line vor 40 tfsi quat s-a (88%) and Audi A4 (76%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Audi A3 s line vor 40 tfsi quat s-a report Full Audi A4 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.