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Audi A6 vs Audi Q3 s line ed 1 40 tdi quat sa: reliability comparison

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

Audi A6
78%
MOT pass rate · 246,602 vehicles
Audi Q3 s line ed 1 40 tdi quat sa
91%
MOT pass rate · 108 vehicles
More reliable
Verdict: On MOT pass rate, the Audi Q3 s line ed 1 40 tdi quat sa is the more reliable of the two — 91% pass first time versus 78%. It's one signal among several; check the full breakdown below.

Head to head

Measure Audi A6 Audi Q3 s line ed 1 40 tdi quat sa
MOT pass rate 78% 91% ✓
MOT failure rate 22% 9% ✓
Faults & advisories per test 1.7 1.1 ✓
Dangerous-fault share 2% ✓ 3%
Average mileage 136,441 mi 48,468 mi
Sample size (vehicles) 246,602 108

Most common faults

Audi A6

  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 Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  4. Offside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  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 Q3 s line ed 1 40 tdi quat sa

  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 Rear Child Seat fitted not allowing full inspection of adult belt
  4. Nearside Front Shock absorbers has light misting of oil (5.3.2 (b))
  5. Nearside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  6. Rear Registration plate deteriorated but not likely to be misread (0.1 (b))

Reliability FAQ

On MOT pass rate, the Audi Q3 s line ed 1 40 tdi quat sa is the more reliable of the two — 91% pass first time versus 78%. It's one signal among several; check the full breakdown below.

Full Audi A6 report Full Audi Q3 s line ed 1 40 tdi quat sa 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.