London Taxis International TX4 MOT pass rate and common failures
In 2025, 67.5% of London Taxis International TX4 MOT tests were a first-time pass, across 10,499 tests in Great Britain. For all cars it was 71.5%.
Compared with cars of the same age
Older cars fail more often, so a model that’s mostly a few years old will look better than one that’s mostly 12. These figures compare like with like.
At 3–5 years
–
Too few tests at this age to say.
At 6–10 years
67.7%
All cars: 76.1% (8.4 points worse). 6,307 tests.
At 11 years and over
67.2%
All cars: 61.3% (5.9 points better). 4,190 tests.
Pass rate by age
Figures by age, with typical mileage
| Age (years) | Tests | First-time pass | All cars | Typical mileage |
|---|---|---|---|---|
| 7 | 461 | 73.3% | 79.3% | 156,250 miles |
| 8 | 1,475 | 70.0% | 76.3% | 171,250 miles |
| 9 | 1,749 | 69.4% | 73.1% | 196,250 miles |
| 10 | 2,622 | 64.4% | 70.0% | 216,250 miles |
| 11 | 977 | 66.8% | 66.9% | 233,750 miles |
| 12 | 479 | 72.7% | 64.4% | 248,750 miles |
| 13 | 820 | 67.9% | 62.1% | 266,250 miles |
| 14 | 690 | 62.9% | 60.2% | 296,250 miles |
| 15 | 489 | 67.3% | 58.6% | 298,750 miles |
| 16 | 329 | 67.5% | 57.5% | 301,250 miles |
| 17 | 235 | 70.2% | 57.2% | 301,250 miles |
| 18 | 171 | 62.0% | 57.0% | 301,250 miles |
Typical mileage is the median reading at the test, to the nearest 2,500 miles.
What fails most often
The share of London Taxis International TX4 MOT tests that failed on at least one item in each area, against all cars. A test can fail on several areas at once.
| Area | TX4 | All cars |
|---|---|---|
| Suspension | 31.6% | 13.7% |
| Lamps, reflectors and electrical equipment | 24.7% | 16.6% |
| Brakes | 14.6% | 10.2% |
| Body, chassis, structure | 6.5% | 4.2% |
| Noise, emissions and leaks | 6.1% | 4.0% |
| Steering | 4.8% | 2.5% |
| Visibility | 4.7% | 5.2% |
| Tyres | 3.6% | 8.4% |
Most common reasons for failing
- Pins and bushes: pin or bush excessively worn failed 11.9% of tests · what this means
- Ball joint excessively worn failed 5.9% of tests · what this means
- Position lamp: not working failed 4.2% of tests · what this means
- Rbt (sp): efficiency below requirements failed 3.4% of tests
- Malfunction indicator lamp: inoperative or indicates a malfunction failed 2.9% of tests · what this means
- Shock absorbers: has an excessively worn bush failed 2.6% of tests
- Headlamp aim: too low failed 2.6% of tests · what this means
- Headlamp: not working on dipped beam failed 2.6% of tests · what this means
- Headlamp aim: too high failed 2.4% of tests · what this means
- Ball joint dust cover no longer prevents the ingress of dirt failed 2.4% of tests · what this means
Checking a particular TX4?
See its own MOT history, mileage record and advisories in plain English. Free, no sign-up.
About these figures
- They cover every TX4 version DVSA records under this name (engines, trims and generations together), on its first MOT test of each visit. A “pass with rectification” (fixed within an hour) counts as a fail, as in DVSA’s own statistics.
- Cars under three years old are left out, because the few tested that young are mostly taxis.
- Fuel mix of the cars tested: diesel 97.2%, liquefied petrolum gas (lpg) 2.0%, gas bi-fuel 0.5%.
- A pass rate describes the model, not any one car. How a car has been looked after matters more.
Download these figures (CSV) · Other London Taxis International models · All makes
Source: DVSA anonymised MOT test data for 2025. Contains public sector information licensed under the Open Government Licence v3.0. Our own analysis; not produced or endorsed by DVSA.