1999 Porsche Boxster: common problems and MOT failures

What goes wrong more than usual on a 1999 Porsche Boxster?

Parts flagged at MOT more often on the 1999 Porsche Boxster than on all cars registered in 1999.

• Anti-roll bar link joints2.9× usual
  Porsche Boxster

  6.4% All 1999 cars

  2.2%

  Failed outright at MOT: 0.7%, against 0.7% of all 1999 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.

• Exhaust emissions (catalyst)1.8× usual
  Porsche Boxster

  8.6% All 1999 cars

  4.7%

  Failed outright at MOT: 8.6%, against 4.6% of all 1999 cars. The rest were advisories or minor defects.

  Rough price £175–£900 (catalytic converter) ClickMechanic

  At the viewing: Look for smoke when revving the warm engine and for engine or DPF warning lights.

Common 1999 Porsche Boxster MOT failures and advisories

The share of 1999 Porsche Boxster MOT tests where testers flagged each area, as a fail or an advisory. Rough prices are typical independent-garage costs.

• Brakes
  32% 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.

• Suspension
  25% 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.

• Tyres
  22% 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.

• Lights and electrics
  19% 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
  14% 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.

• Exhaust and emissions
  10% of testsRough price £100–£1,200

  At the viewing: Look for black soot in the tailpipe, listen for blowing from the exhaust and check for engine or DPF warning lights.

Questions to ask the seller before buying a 1999 Porsche Boxster

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

1. Any recent work on the anti-roll bar link joints? (Flagged at MOT 2.9× as often on the 1999 Porsche Boxster as on other cars the same age.)
2. Any recent work on the exhaust emissions (catalyst)? (Flagged at MOT 1.8× as often on the 1999 Porsche Boxster as on other cars the same age.)
3. Can I see the service history and receipts for any big jobs?