MOT fail rates
London Taxis International TX4 MOT fail rate by age
How often the London Taxis International TX4 fails its MOT at each age, compared with all cars of the same age, and what it fails on. From 53,539 DVSA MOT tests taken 2022 to 2025.
MOT data updated
At 9 years, the most tested age
270 of 315 model groups with enough tests fail less often at 9 years.
What stands out
- At 5 years the London Taxis International TX4 fails 32.2% of MOTs (1,072 tests), 16.9 points above the 15.3% for all cars that age. At 16 years it fails 37.4% (1,614 tests), 5.1 points below the 42.6% average.
- The gap is widest at 5 years: 16.9 points above all cars.
- Its most common structural or mechanical fail item at 9 years: Suspension arm bush worn, at 9.3 per 100 MOTs.
MOT fail rate by age
Solid line: this model. Dashed line: all cars at the same age.
| Age | MOT fail rate | Tests (n) | All cars | Difference | Median mileage |
|---|---|---|---|---|---|
| 5 years | 32.2% | 1,072 | 15.3% | +16.9 pts | 98,908 miles |
| 6 years | 33.1% | 2,704 | 17.8% | +15.3 pts | 121,449 miles |
| 7 years | 33.3% | 4,816 | 20.6% | +12.7 pts | 143,392 miles |
| 8 years | 35.0% | 7,039 | 23.8% | +11.3 pts | 164,907 miles |
| 9 years | 36.5% | 7,223 | 27.1% | +9.4 pts | 186,829 miles |
| 10 years | 36.6% | 7,036 | 30.3% | +6.3 pts | 207,961 miles |
| 11 years | 38.0% | 7,002 | 33.3% | +4.7 pts | 229,571 miles |
| 12 years | 36.7% | 4,858 | 36.0% | +0.7 pts | 255,555 miles |
| 13 years | 38.1% | 4,047 | 38.3% | −0.2 pts | 270,044 miles |
| 14 years | 37.3% | 3,353 | 40.3% | −2.9 pts | 284,279 miles |
| 15 years | 40.7% | 2,775 | 41.6% | −0.9 pts | 294,104 miles |
| 16 years | 37.4% | 1,614 | 42.6% | −5.1 pts | 289,590 miles |
Most common fail items at 9 years
Split into structural or mechanical items and wear items. Wear items (tyres, brake pads, wipers, bulbs) say more about upkeep than about the design.
Structural and mechanical
| Fail item | Per 100 MOTs |
|---|---|
| Suspension arm bush worn Major | 9.3 |
| Malfunction indicator lamp: inoperative or indicates a malfunction Major | 3.6 |
| Suspension ball joint worn Major | 3.5 |
| Handbrake too weak Major | 2.9 |
| Coil spring broken Major | 2.2 |
Out of 7,223 MOTs. A test with two faults counts twice.
Wear and upkeep
| Fail item | Per 100 MOTs |
|---|---|
| Side/position light not working Major | 4.4 |
| Tyre tread below 1.6 mm Dangerous | 3.3 |
| Dipped headlight not working Major | 2.9 |
| Registration plate lamp(s): inoperative in the case of a single lamp or all lamps Major | 2.4 |
| Headlight aimed too high Major | 2.1 |
Out of 7,223 MOTs. A test with two faults counts twice.
Other models at 9 years
| Model | MOT fail rate | Tests (n) | All cars |
|---|---|---|---|
| Ford Fiesta | 32.7% | 481,387 | 27.1% |
| Vauxhall Corsa | 36.3% | 318,680 | 27.1% |
| Ford Focus | 28.1% | 292,862 | 27.1% |
MOT fail rate by first-use year
Each year has its own page: the fail rate for cars first used that year at each MOT from 2022 to 2025 with at least 1,000 tests, the most common faults at that age, and the car tax and ULEZ rules for that year.
First-use year data updated .
| First used | Age at test | MOT fail rate | Tests (n) | All cars |
|---|---|---|---|---|
| 2010 | 13 years in 2023 | 40.2% | 1,199 | 38.3% |
| 2011 | 12 years in 2023 | 38.9% | 1,411 | 36.0% |
| 2012 | 11 years in 2023 | 37.0% | 1,373 | 33.3% |
| 2013 | 11 years in 2024 | 39.0% | 1,273 | 33.3% |
| 2014 | 11 years in 2025 | 35.6% | 2,196 | 33.3% |
| 2015 | 10 years in 2025 | 32.1% | 2,084 | 30.3% |
| 2016 | 9 years in 2025 | 30.5% | 1,583 | 27.1% |
| 2017 | 8 years in 2025 | 27.5% | 1,016 | 23.8% |
More on the London Taxis International TX4
Looking at one London Taxis International TX4?
These are figures for the model, not for one car. The VetTheCar Buying Report looks at a single car: its MOT tests, defects, advisories and mileage readings.
Source
Contains public sector information licensed under the Open Government Licence v3.0. Source: DVSA anonymised MOT test data, class 4 normal MOT tests, 2022 to 2025. MOT data updated 22 September 2026.
Not affiliated with or endorsed by DVSA. How we calculate these figures · Data sources