Porsche 718 Cayman GT4 MOT failures and reliability
The Porsche 718 Cayman GT4 is one of the stronger cars at the MOT: 96% of its 1,004 tests in 2025 were passed first time, 23 points better than the 72% for all cars. Half the Porsche 718 Cayman GT4 cars tested were registered in 2020 or later, and younger cars pass more often. That ranks it 1st of the 10 Porsche models we cover. Every figure here comes from the DVSA's record of each Porsche 718 Cayman GT4 MOT, so it shows what testers found rather than what owners report.
- MOT tests in 2025
- 1,004
- First-time pass rate
- 96%
- All cars
- 72%
Porsche 718 Cayman GT4 MOT strengths and weak spots
The Porsche 718 Cayman GT4's weak spot is number plates and vin: 1.0% of its tests failed there, against 0.3% for all cars.
It does best on lights and electrics, where 0.8% of Porsche 718 Cayman GT4 tests failed against 10.7% for all cars.
Porsche 718 Cayman GT4 cars first registered in 2022 passed 95% first time; those from 2020 passed 97%.
At 5 years old the average Porsche 718 Cayman GT4 had covered 12,804 miles, about 2,600 a year.
The single most common failure on the Porsche 718 Cayman GT4 was tyres, condition: has a cut in excess of the requirements deep enough to reach the ply or cords, on 1.0% of tests.
What the Porsche 718 Cayman GT4 fails on
Share of Porsche 718 Cayman GT4 tests with at least one failure in each area, beside the figure for all cars.
- Tyres1.8% (all cars 6.3%)
- Number plates and VIN1.0% (all cars 0.3%)
- Lights and electrics0.8% (all cars 10.7%)
- Visibility0.5% (all cars 4.4%)
- Exhaust and emissions0.2% (all cars 3.1%)
- Suspension0.2% (all cars 9.1%)
- Brakes0.1% (all cars 6.3%)
Most common failure items
Share of tests on which each item was recorded.
- Tyres, condition: has a cut in excess of the requirements deep enough to reach the ply or cords 1.0%
- Registration plates: does not conform to the specified requirements 0.6%
- Headlamp aim: too high 0.4%
- Tread depth: tread depth below requirements of 1.6mm 0.4%
- Headlamp cleaning device: for LED or HID headlamp inoperative 0.3%
- Registration plates: missing 0.2%
- Washers: provides insufficient washer liquid 0.2%
- Registration plates: incorrect 0.2%
Most common advisories
- Tread depth: worn close to legal limit/worn on edge 3.7%
- Non-component advisories: Nail in tyre 1.1%
- Tyres, condition: slightly damaged/cracking or perishing 1.0%
- Tyres, condition: has a cut but not deep enough to reach the ply or cords 0.5%
- Brake pads: wearing thin 0.3%
- Coil spring: corroded 0.2%
- Brake discs: worn, pitted or scored, but not seriously weakened 0.2%
- Registration plates: deteriorated but not likely to be misread 0.2%
Pass rate by year of registration
First-time pass rate of the Porsche 718 Cayman GT4 by the year it was first registered.
| First registered | Tests | Pass rate |
|---|---|---|
| 2020 | 353 | 97% |
| 2022 | 329 | 95% |
Typical mileage by age
Average Porsche 718 Cayman GT4 odometer reading at the MOT, by age in years at the test.
| Age at test | Average mileage |
|---|---|
| 3 years | 8,281 miles |
| 4 years | 12,614 miles |
| 5 years | 12,804 miles |
Read next
Check a particular Porsche 718 Cayman GT4
The figures above tell you what to look out for on any Porsche 718 Cayman GT4. For one Porsche 718 Cayman GT4's own MOT history, mileage and tax, enter its registration for a free MOT check.
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Source: Department for Transport, Anonymised MOT tests and results, 2025, cars and light vans, normal tests only. Pass rates are first-time passes; a pass after repair at the test station counts as a fail. Contains public sector information licensed under the Open Government Licence v3.0.