Diesel London Taxis International Tx4: MOT pass rate
76.1% of diesel London Taxis International Tx4s pass the MOT first time, measured across 10,876 DVSA tests on that fuel type alone. Average mileage at test was 218,807.
Diesel against the other London Taxis International Tx4 versions
| Fuel | Pass rate | Tests |
|---|---|---|
| Diesel | 76.1% | 10,876 |
| LPG | 62.7% | 220 |
| All London Taxis International Tx4 | 75.7% | 11,190 |
Why the fuel type changes the number
Diesels carry DPFs, EGR valves and stricter smoke limits, so emissions and exhaust faults account for failures petrol cars never see.
On the London Taxis International Tx4 specifically, diesel is the strongest at 76.1%, and this diesel version sits 0.4 points above the 75.7% model average.
What it means if you are buying one
There is little to choose between fuel types on this model, so decide on running costs and mileage rather than MOT record. Buying a damaged one? run it through the analyzer, check the exact car, decode the VIN and check the mileage before you bid.
Mileage is part of the answer
The average diesel London Taxis International Tx4 had covered 218,807 miles at test, against 303,284 for the lpg. That is very high mileage. Clutches, dual-mass flywheels and head gaskets have usually been through at least one repair by this point, so ask for evidence rather than assume the car is original everywhere.
Fuel type and mileage are tangled together: diesels are usually bought by higher-mileage drivers, so some of any gap between fuels is the miles rather than the engine. The per-year figures on the London Taxis International Tx4 page separate age from fuel if you want to isolate one.
Most common MOT failures on a diesel London Taxis International Tx4
- A shock absorber bush excessively worn, 2.7% of tests (13.73x the national rate for this defect)
- Body, cab or chassis excessively corroded at a mounting point, 2.2% of tests (9.72x the national rate for this defect)
- A wheel bearing with excessive play, 1.6% of tests (9.16x the national rate for this defect)
- The strength or continuity of the load bearing structure within 30cm of any seat belt anchorage (a 'prescribed area') is significantly reduced or inadequately repaired, 1.7% of tests (6.22x the national rate for this defect)
- Lamp emitted colour, position or intensity not in accordance with the requirements, 2.8% of tests (4.74x the national rate for this defect)
- A suspension pin, bush or joint excessively worn, 19.5% of tests (3.88x the national rate for this defect)
- Parking brake efficiency below minimum requirement, 3.8% of tests (2.94x the national rate for this defect)
- Steering rack gaiter or ball joint dust cover missing or no longer prevents the ingress of dirt etc, 1.6% of tests (2.1x the national rate for this defect)
- The aim of a headlamp is not within limits laid down in the requirements, 4.8% of tests (2.02x the national rate for this defect)
- Engine MIL illuminated indicating a malfunction, 2.5% of tests (1.95x the national rate for this defect)
From 11,010 DVSA-tracked diesel London Taxis International Tx4 tests, 2024, split out from the London Taxis International Tx4's other fuel types. DVSA testers marked 4.42% of these flagged defects as "dangerous", against 5.11% nationally. See which fuel type fails on the most dangerous defects nationally for how that compares across the whole fleet.
Most common MOT advisories on a diesel London Taxis International Tx4
Flagged but doesn't fail the car, a different list from the failures above.
- Steering box leaking oil, 2% of tests (145.32x the national rate for this defect)
- A shock absorber bush excessively worn, 4.1% of tests (8.61x the national rate for this defect), also fails
- Free play in the steering, measured at the rim of the steering wheel is excessive, 1.6% of tests (8.15x the national rate for this defect)
- A wheel bearing with excessive play, 4.7% of tests (7.24x the national rate for this defect), also fails
- Fluid leaking excessively and likely to harm the environment or to pose a safety risk to other road users, 14.5% of tests (2.6x the national rate for this defect)
- Lamp emitted colour, position or intensity not in accordance with the requirements, 2.8% of tests (2.02x the national rate for this defect), also fails
- A suspension pin, bush or joint excessively worn, 20.3% of tests (1.52x the national rate for this defect), also fails
- A spring or spring component fractured or seriously weakened, 5.5% of tests (1.16x the national rate for this defect)
- Tyre tread depth not in accordance with the requirements, 13.1% of tests
- Brake pipe damaged or excessively corroded, 6.6% of tests
From 11,010 DVSA-tracked diesel London Taxis International Tx4 tests, 2024.