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Audi A6 vs Audi A6 sline black ed tdi ultra 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 sline black ed tdi ultra sa
92%
MOT pass rate · 1,384 vehicles
More reliable
Verdict: On MOT pass rate, the Audi A6 sline black ed tdi ultra sa is the more reliable of the two — 92% pass first time versus 78%. It's one signal among several; check the full breakdown below.

Head to head

Measure Audi A6 Audi A6 sline black ed tdi ultra sa
MOT pass rate 78% 92% ✓
MOT failure rate 22% 8% ✓
Faults & advisories per test 1.7 0.0 ✓
Dangerous-fault share 2% 0% ✓
Average mileage 136,441 mi 99,070 mi
Sample size (vehicles) 246,602 1,384

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 sline black ed tdi ultra sa

  1. Tyre worn close to legal limit/worn on edge Both Front (5.2.3 (e))
  2. Tyre pressure monitoring system inoperative (5.2.3 (h) (ii))
  3. Tyre worn close to legal limit/worn on edge Both Front Wearing From Inside (5.2.3 (e))
  4. Offside Front Obligatory mirror missing Door Mirror Glass Missing (3.3 (a))
  5. Supplementary restraint system warning lamp indicates a fault (7.1.6 (a))
  6. Tyre pressure monitoring system warning lamp indicates a fault (5.2.3 (h) (i))

Reliability FAQ

On MOT pass rate, the Audi A6 sline black ed tdi ultra sa is the more reliable of the two — 92% pass first time versus 78%. It's one signal among several; check the full breakdown below.

Full Audi A6 report Full Audi A6 sline black ed tdi ultra 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.