Used car guide

2015 London Taxis INT TX4: common problems and what to check

What gets flagged at MOT on 2015 London Taxis INT TX4s, from 2,080 tests in 2025, plus known faults and what to look at before you buy one.

2,080MOT tests in 2025
68%pass first time (all 2015 cars: 72%)
20,700typical miles a year
5×the usual rate for engine oil leaks

What stands out

Parts flagged at MOT more often on 2015 London Taxis INT TX4s than on all cars registered in 2015.

  • Engine oil leaks5× usual
    London Taxis INT TX4
    17% All 2015 cars
    3.4%

    Failed outright at MOT: 0.8%, against 0.1% of all 2015 cars. The rest were advisories or minor defects.

    Rough price £80–£600 our estimate

    At the viewing: Look under the engine and where the car is usually parked for fresh oil. Ask whether the leak has been looked at.

  • Suspension arm bushes and joints2.5× usual
    London Taxis INT TX4
    17.9% All 2015 cars
    7.1%

    Failed outright at MOT: 6.8%, against 1.4% of all 2015 cars. The rest were advisories or minor defects.

    Rough price £120–£180 (one arm) ClickMechanic

    At the viewing: Listen for clunks over bumps and feel for the steering wandering. Worn arm bushes show as cracked rubber near the wheels.

  • Steering boxnull× usual
    London Taxis INT TX4
    7.2% All 2015 cars
    0%

    Failed outright at MOT: 0.5%, against 0% of all 2015 cars. The rest were advisories or minor defects.

    Rough price £100–£450 our estimate

    At the viewing: On a straight road the steering wheel should sit straight. Listen for knocks when turning, and check the steering feels even.

  • Wheel bearings9.4× usual
    London Taxis INT TX4
    7.5% All 2015 cars
    0.8%

    Failed outright at MOT: 1.9%, against 0.3% of all 2015 cars. The rest were advisories or minor defects.

    Rough price £120–£300 (one bearing) ClickMechanic

    At the viewing: Listen for a hum or growl that changes as you steer at speed.

  • Headlight aim2.5× usual
    London Taxis INT TX4
    6.4% All 2015 cars
    2.6%

    Failed outright at MOT: 6.4%, against 2.6% of all 2015 cars. The rest were advisories or minor defects.

    Rough price £20–£60 our estimate

    At the viewing: Park facing a wall at night or in a garage and check both headlight beams sit level. Aim is a cheap adjustment.

Better than most

Tyre condition: 3.7% here, against 13.4% of all 2015 cars.

By area

The share of 2015 London Taxis INT TX4 MOT tests where testers flagged each area, as a fail or an advisory. Rough prices are typical independent-garage costs.

  • Suspension
    35% of testsRough price £120–£400

    At the viewing: Listen for knocks over speed bumps, and look behind each front wheel for a snapped coil spring.

  • Lights and electrics
    28% of testsRough price £10–£80

    At the viewing: Ask a friend to check every light, including brake lights and indicators, while you operate them.

  • Brakes
    21% of testsRough price £150–£350

    At the viewing: Look for a lip on the disc edges and feel for judder or pulling when braking firmly from about 40mph.

  • Oil and fluid leaks
    20% of testsRough price £80–£600

    At the viewing: Look under the engine and on the ground where the car is usually parked for fresh oil or fluid.

  • Tyres
    14% of testsRough price £70–£150

    At the viewing: Check the tread on all four tyres, including the inside edges, and look for cracks or bulges.

  • Steering
    10% of testsRough price £100–£450

    At the viewing: On a straight road the steering wheel should sit straight. Feel for play or knocking when turning.

Looking at a London Taxis INT TX4?

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Other years

YearMOT testsMost flagged
20171,008Suspension 34%
20161,575Suspension 36%
20142,193Suspension 37%
2013636Suspension 32%
2012676Suspension 27%
2011798Suspension 31%
2010596Suspension 33%

Where this comes from: the DVSA's anonymised results for every MOT test in Great Britain in 2025, counting tests of 2015 London Taxis INT TX4s registered in 2015. "Flagged" includes advisories, so it isn't the same as a fail rate. How we score