London Taxis Int Tx4 — reliability by registration year
2014–2017 · 4 registration years · 3,684 first tests
Registration years
First-attempt MOT results for every Tx4 registration year with at least 500 first tests in 2025. Pass rates rise with newer cars, so read a year against its neighbours rather than against the top of the table.
| Year | First tests | First-attempt pass | Incl. PRS | Most common failure |
|---|---|---|---|---|
| 2017 | 544 | 70.2% | 81.2% | |
| 2016 | 839 | 68.4% | 80.7% | Pins and bushes (front) 21.2% |
| 2015 | 1,109 | 66.9% | 79.2% | Pins and bushes (front) 20.5% |
| 2014 | 1,192 | 64.1% | 77.5% | Pins and bushes (front) 18.6% |