Model Reports 4 min read Updated 18 Oct 2026

London Taxis International TX4 2014: reliability & common MOT faults

In 2025, 64 in every 100 first MOTs on a 2014 London Taxis International TX4 were passes. Most common reason for a fail: Suspension arm pins and bushes (front).

Summary

The 2014 London Taxis International TX4 follows the pattern of the model years either side.

At a glance

How 1,192 first tests went in 2025.

Passed first time
64 in every 100
Did not pass first time
36 in every 100428 failed first-attempt tests
The typical car
11 yearsabout 220,596 miles
First tests counted
1,192

What failed most often

  1. Suspension arm pins and bushes (front)19 in every 100 failed tests
  2. Headlight aim (front)15 in every 100 failed tests

How we count this. Data: UK MOT open data, 2025. Only Class 4 cars on their first MOT of the year are counted. A car that fails and is fixed at the test station still counts as a fail in the first-attempt rate. These are raw results, not adjusted for age, mileage, or peer mix. The MOT does not test engine or gearbox internals.

Note:

These are patterns across 2014 London Taxis International TX4 vehicles in 2025, not a prediction that any one car will have them. Faults are grouped by part of the car. A wear pattern follows age and use more than the way the car was built. They come from MOT defect codes, not manufacturer bulletins, recalls or a diagnosis of any one car.

Suspension

Five faults. The strongest is the suspension arm pins and bushes (rear): 7.2 times as often as on similar cars.

Figures below are measured across the 424 of 428 failed first attempts (99.1%) that recorded an odometer reading in 2025. Mileage is needed to compare like with like.

We only list faults with at least 20 failures and a rate of about 2.0 times that of similar cars, which keeps one-off results out of the list.

Suspension arm pins and bushes (rear)

Failed on 38 first tests7.2 times as often as similar carsLikely evidence

What it means

Pins and bushes on suspension arms fail as Major when they are excessively worn. They are graded Dangerous when likely to become detached. DVSA uses the same wording for a suspension joint.

Also noted as an advisory

Testers also noted it as an advisory, worn but not yet failing, on 31 first tests, 3.5 times as often as on similar cars.

Suspension arm pins and bushes (front)

Failed on 79 first tests3.7 times as often as similar carsLikely evidence

What it means

Pins and bushes on suspension arms fail as Major when they are excessively worn. They are graded Dangerous when likely to become detached. DVSA uses the same wording for a suspension joint.

Wheel bearings (front)

Failed on 27 first tests3.6 times as often as similar carsPossible evidence

What it means

Excessive play in a wheel bearing, or a bearing that is excessively rough, is Major. Play so excessive that the bearing is likely to break up or directional control is impaired is Dangerous, and so is a bearing so rough that it is likely to overheat or break up.

Also noted as an advisory

Testers also noted it as an advisory, worn but not yet failing, on 38 first tests, 6.6 times as often as on similar cars.

Suspension arm ball joint dust cover (front)

Failed on 24 first tests3.6 times as often as similar carsPossible evidence

What it means

Whether a suspension arm ball joint dust cover still keeps dirt out decides its grade. Severely deteriorated is Minor, while missing, or no longer preventing the ingress of dirt, is Major.

Shock absorbers (front)

Failed on 33 first tests3.5 times as often as similar carsLikely evidence

What it means

Slight seepage that leaves a film of fluid on a shock absorber does not fail it. Severe leakage, or damage so that it does not function, is Major. A shock absorber missing or likely to become detached is graded Dangerous, though a missing one is only rejected if shock absorbers were fitted as standard.

Data: UK MOT open data, 2025. Compared with cars of the same age and mileage. Advisories count notes recorded on failed first tests only.

Lamps and electrical

One fault and one wear pattern. The strongest is the headlight aim (front): 2.6 times as often as on similar cars.

Headlight aim (front)

Failed on 62 first tests2.6 times as often as similar carsWear pattern

What it means

Beam aim too high, too low or off to either side is Major. Where a driver's beam aim control is fitted, the aim is tested without altering the setting, and rechecked at the highest setting only if it would fail for being too low. Masks or converter kits on right hand dip headlamps are acceptable.

Horn

Failed on 20 first tests2.3 times as often as similar carsPossible evidence

What it means

A horn that does not work, or is likely to be confused with an emergency vehicle siren, is graded Major. Gongs, bells, sirens and anything with more than one tone, which includes a horn that alternates between its notes, are not allowed, except a gong, bell or siren on vehicles first used before a set date. Sound defects are Minor for named cases such as a bell or harsh sound, and Major under a general row.

Data: UK MOT open data, 2025. Compared with cars of the same age and mileage.

MOT pass rates

How first tests ended, and how the pass rates are counted.

Passed first time
64in every 100
Passed on the first test.
Fixed at the station
14in every 100
Failed, then fixed at the test station the same day.
Failed
22in every 100
Did not pass, and were not fixed at the test station.

First-attempt pass 64.1% of 1,192 first tests (2025): only cars that passed first time count. Official-style pass 77.5%: cars fixed at the test station also count as a pass. The 14 fixed and the 22 not fixed make the 36 in every 100 that did not pass first time.

Same model, other years

Passed first time in every 100, all tested in 2025.

40608010020102011201220132014201520162017Older carsNewer cars
40608010020102014Older carsNewer cars

Newer cars are younger, so look for a jump rather than the climb. A year earlier (2024), when these cars were a year younger, 60 in every 100 passed first time.

YearPassed first timeFirst tests
201064 in every 100367
201165 in every 100493
201268 in every 100419
201368 in every 100458
2014 This car64 in every 1001,192
201567 in every 1001,109
201668 in every 100839
201770 in every 100544

FAQs

Short answers about how to read this model-year guide.

The 2014 London Taxis International TX4 follows the pattern of the model years either side. Its main cause of failure was Suspension arm pins and bushes (front), about 19 in every 100 failed tests. In 2025, 64.1% of 1,192 first MOTs on the 2014 London Taxis International TX4 passed first time (PRS: items fixed at the station the same day, counted as a fail). The official-style rate including PRS is 77.5%. Among 428 failed first-attempt MOT tests (test year 2025), Suspension arm pins and bushes (rear) appears more often than on similar cars (9.0% of those tests; 38 observed failures; about 7.2× more often than similar cars). There is no single reliability score here; this is a pre-purchase checklist built from DVSA open data, not a guarantee for any individual car.
Ranked by how often they were actually recorded, the items that most often failed a 2014 London Taxis International TX4 at the first attempt were Suspension arm pins and bushes (front) (18.6%) and Headlight aim (front) (14.6%), each as a share of the year's failed first attempts. That is what goes wrong most often on the car. The common faults table shows a different measure: faults that are unusual compared with similar cars.
Among failed first-attempt tests we highlight patterns that appear more often than on similar cars. Top example: Suspension arm pins and bushes (rear) (9.0% of those tests; 38 observed failures; about 7.2× more often than similar cars). These are statistical signals, not a diagnosis of any individual car.
Suspension arm pins and bushes (rear) shows up more often than on similar cars (9.0% of those tests; 38 observed failures; about 7.2× more often than similar cars). That does not prove a design fault. Age, mileage, and how the car was used still matter. Treat it as a pre-purchase checkpoint, not a manufacturer service bulletin.
Common MOT problem areas for the 2014 London Taxis International TX4 include Suspension arm pins and bushes (rear), Wheel bearings (front), Suspension arm ball joint dust cover (front). These are the faults that stand out compared with similar cars, not a complete list of what can go wrong on any individual car.
This page highlights MOT failure patterns for the 2014 London Taxis International TX4 (registration year) using UK DVSA open data for the selected test year. Patterns are compared with cars of a similar age and mileage. It is a buyer checklist from MOT defect statistics, not a full service history or manufacturer service-bulletin list.
No. MOT tests do not cover engine internals, gearboxes, or many electronic modules. Patterns here come from MOT defect statistics only and should not be read as engine or gearbox reliability scores.

About this data

How this page is built and what it can (and can't) say.

These figures come from UK MOT open data for this model year. We surface common failure patterns against similar cars, not a full reliability score, and not a pass/fail verdict on any individual vehicle.

2024 2025

What we include

UK Class 4 cars only. Normal MOT tests (not retests); first test per vehicle per calendar year; results pass, PRS, or fail.

Same-day repairs

PRS means the car failed items that were fixed at the test station and then passed the same day. We count PRS as a first-attempt fail in headline rates so same-day repairs do not hide problems.

How we compare

We compare this model year with other Class 4 cars of similar age and mileage in the same test year. This model family is left out of the peer group so the car is not measured against itself.

What this does not cover

  • MOTs do not cover engine internals, gearboxes, or many electronics; this is not a full reliability score.
  • Common faults come from MOT defect stats, not manufacturer TSBs or recalls.
  • Age and mileage matching reduces, but does not remove, differences in how cars were used and maintained.
  • If the data for a car is too thin to say anything useful, we say so rather than guess.

Contains public sector information licensed under the Open Government Licence v3.0.

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