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Audi A4 vs Audi E-tron s line 50 quattro: 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 E-tron s line 50 quattro
90%
MOT pass rate · 1,197 vehicles
More reliable
Verdict: On MOT pass rate, the Audi E-tron s line 50 quattro is the more reliable of the two — 90% pass first time versus 76%. It's one signal among several; check the full breakdown below.

Head to head

Measure Audi A4 Audi E-tron s line 50 quattro
MOT pass rate 76% 90% ✓
MOT failure rate 24% 10% ✓
Faults & advisories per test 1.9 0.9 ✓
Dangerous-fault share 2% ✓ 8%
Average mileage 133,841 mi 40,957 mi
Sample size (vehicles) 568,515 1,197

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 E-tron s line 50 quattro

  1. Nearside Rear 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. Offside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  4. Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  5. Nearside Rear Child Seat fitted not allowing full inspection of adult belt
  6. Nearside Rear Nail in tyre

Reliability FAQ

On MOT pass rate, the Audi E-tron s line 50 quattro is the more reliable of the two — 90% pass first time versus 76%. It's one signal among several; check the full breakdown below.

Full Audi A4 report Full Audi E-tron s line 50 quattro 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.