2006 Vauxhall Astra diesel: common problems and MOT failures

What goes wrong more than usual on a 2006 Vauxhall Astra diesel?

Parts flagged at MOT more often on the 2006 Vauxhall Astra diesel than on all cars registered in 2006.

• Brake discs1.9× usual
  Vauxhall Astra

  26.7% All 2006 cars

  14.2%

  Failed outright at MOT: 2.9%, against 1.1% of all 2006 cars. The rest were advisories or minor defects.

  Rough price £150–£350 our estimate

  At the viewing: Look through the wheel at the brake disc: a deep lip at the edge or heavy scoring means they're worn. Feel for judder when braking.

• Rigid brake pipes1.7× usual
  Vauxhall Astra

  23.9% All 2006 cars

  14%

  Failed outright at MOT: 3.7%, against 2.5% of all 2006 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.

• Coil springs1.8× usual
  Vauxhall Astra

  18.9% All 2006 cars

  10.6%

  Failed outright at MOT: 8.5%, against 3.3% of all 2006 cars. The rest were advisories or minor defects.

  Rough price £175–£400 (pair, one axle) ClickMechanic

  At the viewing: Look behind each wheel for a snapped spring coil, and listen for a clunk or twang when turning the wheel lock to lock with the car stopped.

• Steering swivel joints6.8× usual
  Vauxhall Astra

  8.2% All 2006 cars

  1.2%

  Failed outright at MOT: 2.4%, against 0.2% of all 2006 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.

• Shock absorbers1.8× usual
  Vauxhall Astra

  13.1% All 2006 cars

  7.4%

  Failed outright at MOT: 4%, against 1.9% of all 2006 cars. The rest were advisories or minor defects.

  Rough price £200–£300 (pair, average rear to front) ClickMechanic

  At the viewing: Push down hard on each corner. It should bounce once and settle. Look for oil on the shock absorber body.

Common 2006 Vauxhall Astra diesel MOT failures and advisories

The share of 2006 Vauxhall Astra diesel MOT tests where testers flagged each area, as a fail or an advisory. Rough prices are typical independent-garage costs.

• Suspension
  57% 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
  54% 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
  40% of testsRough price £10–£80

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

• Tyres
  38% 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.

• Oil and fluid leaks
  21% 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.

• Wipers, windscreen and mirrors
  13% of testsRough price £15–£250

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

Known faults on the 2006 Vauxhall Astra diesel

Reported by owners, mechanics and buying guides for this model and age. Check which engine the car has, as some apply to one engine only.

• Timing belt and water pump

  Engines with a timing belt

  Where fitted, the timing belt needs changing every 40,000 miles or the engine can be wrecked, and a failing water pump can damage the engine.

  At the viewing: Ask for invoices for the timing belt and water pump.

  Source: What Car?: used Vauxhall Astra (2004-2010) reliability

• 1.9 diesel problems

  1.9 CDTi diesel

  The 1.9 diesel is the least reliable engine, with engine problems and smoke.

  At the viewing: Look for smoke when you accelerate hard and check for warning lights.

  Source: What Car?: used Vauxhall Astra (2004-2010) reliability

• Clutch judder

  Manual gearbox

  Both petrol and diesel cars can be hard to pull away smoothly. Dealers can fit modified parts.

  At the viewing: Pull away gently a few times.

  Source: What Car?: used Vauxhall Astra (2004-2010) reliability

• Worn front suspension bushes

  All engines

  The front suspension bushes can wear quickly.

  At the viewing: Listen for knocks over bumps.

  Source: What Car?: used Vauxhall Astra (2004-2010) reliability

• Electrical faults

  All engines

  The instrument cluster can give false readings and electric windows can fail.

  At the viewing: Try every window and watch the gauges.

  Source: What Car?: used Vauxhall Astra (2004-2010) reliability

Questions to ask the seller before buying a 2006 Vauxhall Astra diesel

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

1. When were the timing belt and water pump last changed, and is there an invoice?
2. Any recent work on the brake discs? (Flagged at MOT 1.9× as often on the 2006 Vauxhall Astra diesel as on other cars the same age.)
3. Any recent work on the rigid brake pipes? (Flagged at MOT 1.7× as often on the 2006 Vauxhall Astra diesel as on other cars the same age.)
4. Any recent work on the coil springs? (Flagged at MOT 1.8× as often on the 2006 Vauxhall Astra diesel as on other cars the same age.)
5. Can I see the service history and receipts for any big jobs?