2018 · 6 years old at test · Petrol mostly

2018 Porsche Cayman MOT pass rate and common faults

1,203 MOT tests in 2024. 93.0% passed first time, compared with 82.5% for all cars the same age.

113Well above average
Passed first time93.0%
Failed or needed repairs7.0%
Typical mileage at test27,000

Most common reasons for failing

Share of all 1,203 tests where this item caused a failure.

  1. Tread depth below requirements of 1.6mm1.9%
    62 marked dangerous
  2. Tyres - condition: has a bulge, caused by separation or partial failure of its structure1.2%
    24 marked dangerous
  3. Tyres - condition: has a cut in excess of the requirements deep enough to reach the ply or cords0.6%
  4. Washers: provides insufficient washer liquid0.4%
  5. Registration plates: does not conform to the specified requirements0.2%
  6. Washers: not working0.2%
  7. Tyres - condition: has a lump, caused by separation or partial failure of its structure0.2%
    6 marked dangerous
  8. Malfunction indicator lamp: inoperative or indicates a malfunction0.2%
  9. Tyre pressure monitoring system: malfunctioning or obviously inoperative0.2%
  10. Headlamp aim: too high0.2%

Problem areas

Failure items found per 100 tests, by part of the car.

  1. Tyres4.5%
  2. Lights & electrics1.2%
  3. Visibility (wipers, screen, mirrors)1.0%
  4. Brakes0.5%
  5. Number plates & VIN0.4%
  6. Emissions & leaks0.4%
  7. Body & chassis0.2%
  8. Steering0.1%

Most common advisories

Not failures yet, but things the tester warned about.

  1. Tread depth below requirements of 1.6mm9.1%
  2. Tyres - condition: has a tear, caused by separation or partial failure of its structure6.9%
  3. Brake discs: in such a condition that it is seriously weakened2.6%
  4. Non-component advisories: Nail in tyre1.7%
  5. Brake pads: less than 1.5 mm thick1.4%

What this means if you are buying one

This model year does better than most cars its age, so it is a reasonable used buy on MOT record alone. Before buying, check the area that fails most: tread depth below requirements of 1.6mm. Then look up the car's own MOT history on GOV.UK with its number plate, and look for repeat advisories.

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Questions

What is the MOT pass rate for a 2018 Porsche Cayman?

In 2024, 93.0% of 2018 Porsche Cayman cars passed their MOT first time, across 1,203 tests. The average for all 6-year-old cars was 82.5%.

What are the most common MOT failures on a 2018 Porsche Cayman?

The most common failure reasons were tread depth below requirements of 1.6mm; tyres - condition: has a bulge, caused by separation or partial failure of its structure; tyres - condition: has a cut in excess of the requirements deep enough to reach the ply or cords. The biggest problem area was tyres.

Is the 2018 Porsche Cayman reliable at MOT time?

Its MOT Rank score is 113, which is well above average for a car of its age (100 means exactly average).