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Audi A4 vs Audi A6 aroad vor 50tdi mhev quat a: 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 A6 aroad vor 50tdi mhev quat a
92%
MOT pass rate · 25 vehicles
Verdict: On MOT pass rate the Audi A4 (76%) and Audi A6 aroad vor 50tdi mhev quat a (92%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Head to head

Measure Audi A4 Audi A6 aroad vor 50tdi mhev quat a
MOT pass rate 76% 92% ✓
MOT failure rate 24% 8% ✓
Faults & advisories per test 1.9 0.9 ✓
Dangerous-fault share 2% ✓ 5%
Average mileage 133,841 mi 59,153 mi
Sample size (vehicles) 568,515 25

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 A6 aroad vor 50tdi mhev quat a

  1. Offside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  2. Nearside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  3. under trays fitted
  4. Front Brake pad(s) wearing thin (1.1.13 (a) (ii))
  5. under trays fitted obscuring some components
  6. Front Brake disc worn, pitted or scored, but not seriously weakened (1.1.14 (a) (ii))

Reliability FAQ

On MOT pass rate the Audi A4 (76%) and Audi A6 aroad vor 50tdi mhev quat a (92%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Audi A4 report Full Audi A6 aroad vor 50tdi mhev quat 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.