Used car guide

2008 Porsche Cayman: common problems and MOT failures

What MOT testers find on the Porsche Cayman first registered in 2008: we looked at the 2,609 MOTs these cars had during 2023–2025. Plus known faults and what to look at before you buy one.

2,609MOTs of 2008 cars, done in 2023–2025
80%pass first time (all 2008 cars: 57%)
4,400typical miles a year
2.1×the usual rate for steering rack inner joints

What goes wrong more than usual on a 2008 Porsche Cayman?

Parts flagged at MOT more often on the 2008 Porsche Cayman than on all cars registered in 2008.

  • Steering rack inner joints2.1× usual
    Porsche Cayman
    5.8% All 2008 cars
    2.7%

    Failed outright at MOT: 0%, against 0% of all 2008 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.

Better than most

Tread depth: 10.2% here, against 22.8% of all 2008 cars. Suspension arm bushes and joints: 1.7% here, against 10.7% of all 2008 cars.

Common 2008 Porsche Cayman MOT failures and advisories

The share of 2008 Porsche Cayman MOT tests where testers flagged each area, as a fail or an advisory. Rough prices are typical independent-garage costs.

  • Brakes
    27% 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.

  • Tyres
    19% 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.

  • Suspension
    15% 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
    14% of testsRough price £10–£80

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

  • Steering
    7% 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.

  • Oil and fluid leaks
    6% 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.

Questions to ask the seller before buying a 2008 Porsche Cayman

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

  1. Any recent work on the steering rack inner joints? (Flagged at MOT 2.1× as often on the 2008 Porsche Cayman as on other cars the same age.)
  2. Can I see the service history and receipts for any big jobs?

Looking at a Porsche Cayman?

Check the actual car: its own MOT history, mileage and what to ask the seller. Free, no sign-up.

Other years

Every year of the Porsche Cayman compared

YearMOT testsMost flagged
2022493Tyres 12%
2021899Tyres 15%
20201,354Tyres 16%
20193,003Tyres 20%
20183,541Tyres 19%
20172,641Tyres 20%
20162,943Tyres 14%
20153,271Tyres 13%
20143,546Tyres 18%
20133,115Tyres 17%
20121,028Brakes 16%
20111,612Brakes 18%
20101,587Brakes 26%
20091,965Brakes 22%
20074,185Brakes 26%
20064,415Brakes 29%
2005483Brakes 31%

Where this comes from: the DVSA's anonymised results for every MOT test done in Great Britain during 2023–2025, counting the MOTs of Porsche Cayman cars first registered in 2008. "Flagged" includes advisories, so it isn't the same as a fail rate. How we score