2018 Porsche Cayman · 5,787 MOT tests
2018 Porsche Cayman reliability
2018 Porsche Caymans fail 5.2% of first MOT tests, 59% fewer MOT fails than the average car its age and mileage, ranking 11 of 15 Cayman years (5,787 DVSA tests, 2022 to 2024).
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- first-time fail rate (all Porsche Caymans: 9.8%)
- 5.2%
- first-time fail rate (all Porsche Caymans: 9.8%)
- fails than cars of the same age and mileage
- 59% fewer
- fails than cars of the same age and mileage
- typical miles at its MOT, aged about 5
- 24,481
- typical miles at its MOT, aged about 5
- MOT tests, 2022 to 2024
- 5,787
- MOT tests, 2022 to 2024
Year on year
2018 against the years either side
- 2017 cars: 64% fewer MOT fails than the average car its age (the 2018 car does worse)
- 2019 cars: 52% fewer MOT fails than the average car its age (the 2018 car does better)
- Strong point: windscreen, wipers and mirrors, 69% fewer fails than comparable cars.
- Plates: a 2018 car carries a 67 plate (January–February 2018), or a 18 plate (March–August 2018), or a 68 plate (September–December 2018).
Common problems
What fails on a 2018 Porsche Cayman
Fail rate by area
- Tyres3%
- Windscreen, wipers and mirrors1%
- Lights and electrics0.8%
- Number plates and VIN0.5%
- Exhaust, emissions and leaks0.2%
- Brakes0.2%
- Suspension0.1%
Average for cars of the same age and mileage
Top failures
Tyre tread below 1.6mm 0.97%
Tread below 1.6mm is illegal and reduces grip in wet conditions, so the tyre must be replaced.
Tyre bulge from structural failure 0.52%
A bulge means the tyre's structure has failed and it could burst suddenly, so it must be replaced at once.
Tyre cut reaching ply or cords 0.38%
A cut reaching the ply or cords weakens the tyre and can cause a burst, so it must be replaced.
Number plate does not meet standards 0.29%
The plate does not meet legal specifications, so it must be replaced with a compliant one before the car is driven.
Windscreen washer fluid insufficient 0.24%
Washers are not supplying enough liquid, so the windscreen cannot be cleared properly, which is a safety issue.
Tyre lump from structural separation 0.17%
A tyre lump means its structure has partly failed and it could burst, so replace it immediately.
Common advisories
Tyre worn close to legal limit (5.5%) · Tyre slightly damaged or cracking (4.87%) · Nail in tyre, monitor (1.16%) · Brake disc pitted or scored (1.07%) · Brake pads wearing thin (0.79%) · Tyre worn close to legal limit (0.73%)
Other years
Every Porsche Cayman year
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Source: DVSA anonymised MOT results, 2022 to 2024, class 4 normal tests.
Is a 2018 Porsche Cayman reliable?
2018 Porsche Caymans fail 5.2% of first MOT tests, 59% fewer MOT fails than the average car its age and mileage, ranking 11 of 15 Cayman years (5,787 DVSA tests, 2022 to 2024).
What fails on a 2018 Porsche Cayman MOT?
Most often tyre tread below 1.6mm (0.97% of tests), tyre bulge from structural failure (0.52% of tests), tyre cut reaching ply or cords (0.38% of tests).
How many miles should a 2018 Porsche Cayman have done?
At its MOT aged about 5, a typical 2018 Porsche Cayman shows 24,481 miles. Much higher or lower is worth asking about.
What plate is a 2018 car?
A car first registered in 2018 carries a 67 plate (January–February 2018), or a 18 plate (March–August 2018), or a 68 plate (September–December 2018).
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