2009 London Taxis INT TX4 diesel: common problems and MOT failures

What goes wrong more than usual on a 2009 London Taxis INT TX4 diesel?

Parts flagged at MOT more often on the 2009 London Taxis INT TX4 diesel than on all cars registered in 2009.

• Engine oil leaks1.9× usual
  London Taxis INT TX4

  17.1% All 2009 cars

  8.9%

  Failed outright at MOT: 0.8%, against 0.3% of all 2009 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.

• Steering boxnull× usual
  London Taxis INT TX4

  5.2% All 2009 cars

  0%

  Failed outright at MOT: 0.6%, against 0% of all 2009 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.

• Rigid brake pipes1.8× usual
  London Taxis INT TX4

  12.6% All 2009 cars

  7.1%

  Failed outright at MOT: 2.5%, against 1.2% of all 2009 cars. The rest were advisories or minor defects.

  Rough price £100–£400 our estimate

  At the viewing: Ask to see underneath, or check the MOT advisories: corroded brake or fuel pipes get worse every year and fail the MOT when they do.

• Wheel bearings2.7× usual
  London Taxis INT TX4

  5.7% All 2009 cars

  2.1%

  Failed outright at MOT: 1%, against 0.8% of all 2009 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 2009 London Taxis INT TX4 diesel MOT failures and advisories

The share of 2009 London Taxis INT TX4 diesel MOT tests where testers flagged each area, as a fail or an advisory. Rough prices are typical independent-garage costs.

• Suspension
  31% 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.

• Brakes
  29% 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.

• Lights and electrics
  26% of testsRough price £10–£80

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

• Oil and fluid leaks
  19% 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
  13% 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.

• Rust and bodywork
  12% of testsRough price £150–£1,000

  At the viewing: Check the sills, wheel arches and underneath for rust, and look along the panels for uneven gaps or paint.

Questions to ask the seller before buying a 2009 London Taxis INT TX4 diesel

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 1.9× as often on the 2009 London Taxis INT TX4 diesel as on other cars the same age.)
2. Any recent work on the steering box? (Flagged at MOT null× as often on the 2009 London Taxis INT TX4 diesel as on other cars the same age.)
3. Any recent work on the rigid brake pipes? (Flagged at MOT 1.8× as often on the 2009 London Taxis INT TX4 diesel as on other cars the same age.)
4. Can I see the service history and receipts for any big jobs?