Audi A4 vs Audi Tt: MOT reliability compared
Updated 05 September 2026.
21.8%
Audi Tt MOT failure rate, 1.9 pts lower than Audi A4
Audi Tt is the more reliable MOT performer: 21.8% of Audi Tt MOTs fail versus 23.7% for Audi A4, a 1.9 point gap.
| Metric | Audi A4 | Audi Tt |
|---|---|---|
| MOT failure rate | 23.7% | 21.8% |
| Tests analysed | 7,296,945 | 2,360,430 |
| Most common failure | Suspension (29.5%) | Lamps & electrical (32.8%) |
Questions and answers
Which is more reliable, Audi A4 or Audi Tt?
Audi Tt is the more reliable MOT performer: 21.8% of Audi Tt MOTs fail versus 23.7% for Audi A4, a 1.9 point gap.
What is the MOT failure rate of the Audi A4?
23.7% of Audi A4 MOT tests result in a failure, from 7,296,945 tests.
What is the MOT failure rate of the Audi Tt?
21.8% of Audi Tt MOT tests result in a failure, from 2,360,430 tests.