2015 London Taxis INT TX4: common problems and MOT failures

What goes wrong more than usual on a 2015 London Taxis INT TX4?

Parts flagged at MOT more often on the 2015 London Taxis INT TX4 than on all cars registered in 2015.

• Engine oil leaks5.3× usual
  London Taxis INT TX4

  13.2% All 2015 cars

  2.5%

  Failed outright at MOT: 0.5%, 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 joints2.7× usual
  London Taxis INT TX4

  15.8% All 2015 cars

  5.9%

  Failed outright at MOT: 6.6%, against 1.2% 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

  5.7% 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.

• Ball joint2.7× usual
  London Taxis INT TX4

  8% All 2015 cars

  3%

  Failed outright at MOT: 3.6%, against 1.7% of all 2015 cars. The rest were advisories or minor defects.

  Rough price £60–£150 (one joint) ClickMechanic

  At the viewing: Listen for knocking over bumps and check the rubber boots behind the wheels aren't split.

• Wheel bearings7.4× usual
  London Taxis INT TX4

  5.2% All 2015 cars

  0.7%

  Failed outright at MOT: 1.4%, 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.

Common 2015 London Taxis INT TX4 MOT failures and advisories

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
  33% 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
  25% 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
  19% 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
  15% 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.

• Wipers, windscreen and mirrors
  9% of testsRough price £15–£250

  At the viewing: Check for chips in the driver's view, and test the wipers and washers.

Questions to ask the seller before buying a 2015 London Taxis INT TX4

Ask before you travel to see it. A seller who knows the car will have answers, and receipts.

1. Any recent work on the engine oil leaks? (Flagged at MOT 5.3× as often on the 2015 London Taxis INT TX4 as on other cars the same age.)
2. Any recent work on the suspension arm bushes and joints? (Flagged at MOT 2.7× as often on the 2015 London Taxis INT TX4 as on other cars the same age.)
3. Any recent work on the steering box? (Flagged at MOT null× as often on the 2015 London Taxis INT TX4 as on other cars the same age.)
4. Can I see the service history and receipts for any big jobs?