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Audi A4 technik 35 tfsi vs Audi A6: reliability comparison

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

Audi A4 technik 35 tfsi
92%
MOT pass rate · 202 vehicles
More reliable
Audi A6
78%
MOT pass rate · 246,602 vehicles
Verdict: On MOT pass rate, the Audi A4 technik 35 tfsi 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 A4 technik 35 tfsi Audi A6
MOT pass rate 92% ✓ 78%
MOT failure rate 8% ✓ 22%
Faults & advisories per test 1.0 ✓ 1.7
Dangerous-fault share 7% 2% ✓
Average mileage 52,049 mi 136,441 mi
Sample size (vehicles) 202 246,602

Most common faults

Audi A4 technik 35 tfsi

  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. Rear Brake pad(s) wearing thin (1.1.13 (a) (ii))
  4. Front Brake pad(s) wearing thin (1.1.13 (a) (ii))
  5. Nearside Rear Shock absorbers has light misting of oil (5.3.2 (b))
  6. Offside Rear Tyre slightly damaged/cracking or perishing (5.2.3 (d) (ii))

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)

Reliability FAQ

On MOT pass rate, the Audi A4 technik 35 tfsi 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 A4 technik 35 tfsi report Full Audi A6 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.