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Audi A6 vs Audi A6 s line black ed 40 tdi 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 A6 s line black ed 40 tdi sa
90%
MOT pass rate · 1,909 vehicles
More reliable
Verdict: On MOT pass rate, the Audi A6 s line black ed 40 tdi sa is the more reliable of the two — 90% pass first time versus 78%. It's one signal among several; check the full breakdown below.

Head to head

Measure Audi A6 Audi A6 s line black ed 40 tdi sa
MOT pass rate 78% 90% ✓
MOT failure rate 22% 10% ✓
Faults & advisories per test 1.7 0.9 ✓
Dangerous-fault share 2% ✓ 7%
Average mileage 136,441 mi 58,349 mi
Sample size (vehicles) 246,602 1,909

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 A6 s line black ed 40 tdi sa

  1. Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  2. Offside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  3. Nearside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  4. Offside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  5. Front Brake pad(s) wearing thin (1.1.13 (a) (ii))
  6. Rear Brake pad(s) wearing thin (1.1.13 (a) (ii))

Reliability FAQ

On MOT pass rate, the Audi A6 s line black ed 40 tdi sa is the more reliable of the two — 90% pass first time versus 78%. It's one signal among several; check the full breakdown below.

Full Audi A6 report Full Audi A6 s line black ed 40 tdi 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.