London Taxis Int TX4 Reliability and Common Problems
What the London Taxis Int TX4 fails its MOT on, with rough repair costs, and its MOT pass rate for each model year. Based on 20,611 MOT tests across 12 model years (DVSA data for tests carried out in 2024, retests included).
Segment: large car | Fuel: Diesel, Petrol/gas
82%
London Taxis Int TX4 pass rate
76%
London Taxis Int average
82%
All-model average
The London Taxis Int TX4 has an average MOT pass rate of 82%, which is 6 points above the London Taxis Int average and equal to the average across all models in our data. Newer London Taxis Int TX4s pass their MOT more often than older ones, by 13 percentage points on average, which is mostly down to age and wear.
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What the London Taxis Int TX4 Fails Its MOT On
Of the 3,152 MOT tests on the London Taxis Int TX4 that failed at the first attempt in 2025, the share that failed on each part of the test, next to the share for all cars and vans of the same ages. A test that failed on two areas counts in both.
Lights and electrics
50%Cars and vans the same age: 37% (the TX4 fails on this more often) · Typical repair £15-£200
Suspension
49%Cars and vans the same age: 35% (the TX4 fails on this more often) · Typical repair £150-£600
Brakes
29%Cars and vans the same age: 22% (the TX4 fails on this more often) · Typical repair £80-£450
Exhaust, emissions and leaks
17%Cars and vans the same age: 11% (the TX4 fails on this more often) · Typical repair £80-£800
Body, chassis and structure
14%Cars and vans the same age: 11% (the TX4 fails on this more often) · Typical repair £200-£1200
The 3 single faults it failed on most
- Suspension arm pin or bush excessively worn (22% of failed tests, suspension)
- Position lamp: not working (12% of failed tests, lights and electrics)
- Suspension arm ball joint excessively worn (11% of failed tests, suspension)
Source: CarCostCheck analysis of DVSA anonymised MOT test results and failure items for 2025: first attempt at each MOT, fail and pass-after-repair defects, DVSA's defect categories (names shortened). Repair costs are rough UK ranges, not quotes. Method and national figures: MOT failure reasons 2025.
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London Taxis Int TX4 Reliability by Year
MOT pass rate for each model year, from DVSA data for tests carried out in 2024 (retests included). Newer cars usually pass more often simply because they are younger. Highest and lowest are marked among years with 100+ tests that were at least three years old when tested. Fuel and engine size are a guide only.
Highest Pass Rate
2015
86% pass rate from 3,806 tests
Level with 2013, 2016 and 2017
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London Taxis Int TX4 FAQ
What are the most common London Taxis Int TX4 problems?
In 2025, MOT tests on the London Taxis Int TX4 that failed at the first attempt most often failed on lights and electrics (50% of the 3,152 failed tests), suspension (49%) and brakes (29%). The single most common fault was "Suspension arm pin or bush excessively worn" (22%). Across 20,611 MOT tests (DVSA MOT data for tests in 2024, retests included), 82% ended in a pass.
Is the London Taxis Int TX4 reliable?
The London Taxis Int TX4 has an average MOT pass rate of 82%, from 20,611 MOT tests. That is level with the average across all models in our data (82%), so about average. Pass rates fall as cars age, so compare it with cars of a similar age.
Which year London Taxis Int TX4 is the most reliable?
Of the years with at least 100 tests that were old enough for a routine MOT, the 2015 London Taxis Int TX4 has the highest MOT pass rate: 86% of its 3,806 tests ended in a pass. The 2013, 2016 and 2017 are level on 86%. The 2009 has the lowest at 70%. Newer cars usually pass more often simply because they are younger, so the pass rate is only part of the picture.
How much does it cost to fix common London Taxis Int TX4 faults?
As a rough guide, brake work on a London Taxis Int TX4 typically costs £80-£450 and suspension repairs £150-£600, while exhaust and emissions fixes can cost £80-£800. Lighting and wiper fixes are usually under £200.
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Other London Taxis Int Models
Common problems pages for other London Taxis Int models