Porsche Cayman common problems and MOT pass rate

In 2025, DVSA recorded 14,709 initial MOT tests on the Porsche Cayman in Great Britain, and 88.9% passed first time. Here is where the rest failed.

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Porsche Cayman at the MOT, 2025

Initial MOT tests: 14,709
Passed first timeAll cars and vans: 72.1%: 88.9%
Failed at firstIncluding 1.7% repaired at the test and passed (PRS): 11.1%
Had a dangerous defectAll cars and vans: 7.3%: 2.7%
Licensed in the UKEnd of 2026 Q2, plus 1,530 off the road (SORN): 9,255

Contains DVSA MOT data, Open Government Licence v3.0, year 2025.

Failure areas

Where the Cayman fails its MOT

The share of initial tests in 2025 with at least one fail or PRS item in each part of the MOT. A test can fail in more than one area, so these do not add up to the fail rate.

1Lamps, reflectors and electrical equipment
3.6%
Headlamps and their aim, brake lights, indicators, fog and reversing lamps, warning lights, battery and wiringAll cars and vans: 10.8%
2Tyres
2.8%
Tread depth, cuts and bulges, the right size and type, valves and tyre pressure warning systemsAll cars and vans: 6.2%
3Brakes
2.3%
Pedal and handbrake, pipes and hoses, discs, pads and drums, and how well the car stopsAll cars and vans: 6.4%
4Suspension
2.0%
Springs, shock absorbers, suspension arms and bushes, anti-roll bars, wheel bearings and axlesAll cars and vans: 9.0%
5Noise, emissions and leaks
1.7%
Exhaust emissions and smoke, exhaust noise and fluid leaksAll cars and vans: 3.2%
6Visibility
1.4%
The driver's view, windscreen damage, wipers, washers and mirrorsAll cars and vans: 4.4%
7Body, chassis and structure
0.5%
Corrosion and damage to the structure, the exhaust system, fuel system, doors, seats, towbar, bumpers and engine mountingsAll cars and vans: 3.3%
8Registration plates and VIN
0.5%
Number plates and the vehicle identification numberAll cars and vans: 0.3%
9Steering
0.4%
Steering rack, joints and linkages, power steering, the steering wheel and columnAll cars and vans: 2.0%
10Seat belts and airbags
0.2%
Seat belts, airbags and the airbag warning lightAll cars and vans: 1.0%

This modelAll cars and vans

Parts

The parts that fail most

Share of initial tests with a fail or PRS item on each part, 2025.

Exhaust emissionsEmissions and leaks1.7%
ConditionTyres1.5%
Position lampsLamps and electrics1.4%
Headlamp aimLamps and electrics1.3%
Tread depthTyres1.2%
Brake performanceBrakes1.1%
Rigid brake pipesBrakes1.0%
SpringsSuspension0.9%

By age

Pass rate by year first used

Older cars fail more often, so compare a car with others of its year. Cars up to 25 years old; years with fewer than 250 tests are left out.

First used	Tests	Passed first time	Dangerous defect
2022	476	94.5%	2.9%
2021	445	95.7%	1.6%
2020	440	94.3%	3.0%
2019	1,002	94.5%	2.5%
2018	1,191	93.8%	3.6%
2017	882	93.1%	2.4%
2016	1,006	93.9%	1.5%
2015	1,099	93.3%	1.6%
2014	1,193	91.1%	2.5%
2013	1,042	90.1%	2.7%
2012	345	93.3%	1.2%
2011	535	88.2%	3.0%
2010	527	85.8%	3.6%
2009	659	87.1%	2.4%
2008	865	78.2%	3.4%
2007	1,394	80.6%	2.9%
2006	1,437	79.3%	3.5%

Mileage

Cayman mileage by age

The median reading at the test: half the cars of that age had covered more, half less. Estimated from 1,000-mile bands, for cars up to 25 years old.

A car well above or below the typical figure is not a problem in itself, but the readings should rise steadily from one MOT to the next. A fall, or a long gap, is worth asking about.

Check a car's mileage record

Age at test	Median mileage	Readings
2 years	11,400 miles	360
3 years	14,500 miles	429
4 years	19,100 miles	458
5 years	24,200 miles	717
6 years	28,700 miles	1,036
7 years	33,400 miles	1,120
8 years	33,900 miles	795
9 years	30,100 miles	1,178
10 years	44,700 miles	1,108
11 years	49,100 miles	1,210
12 years	49,800 miles	504
13 years	51,800 miles	505
14 years	60,500 miles	510
15 years	67,300 miles	568
16 years	71,400 miles	708
17 years	74,700 miles	1,191
18 years	80,100 miles	1,384
19 years	78,400 miles	919

Checking a particular Cayman?

Averages tell you what to look at. The registration tells you about this car: every MOT since 2005 with its failures and advisories, each mileage reading, and whether it is taxed.

Questions

Porsche Cayman: common questions

Contains DVSA MOT data, Open Government Licence v3.0, year 2025.

What is the most common MOT failure on the Porsche Cayman?

In DVSA's 2025 test records, the area that failed most often on the Porsche Cayman was lamps, reflectors and electrical equipment: 3.6% of initial tests had at least one fail or PRS item there, against 10.8% for all cars and vans. Next came tyres (2.8%) and brakes (2.3%).

What is the MOT pass rate for the Porsche Cayman?

88.9% of 14,709 initial MOT tests on the Porsche Cayman in 2025 were a pass first time. Another 1.7% passed after small repairs made at the test station within the hour (PRS). Across all cars and vans, 72.1% passed first time.

Does a lower pass rate mean the Porsche Cayman is unreliable?

Not on its own. MOT results depend on age, mileage and upkeep as much as on design, so a model with many older cars on the road will usually fail more often. The table by year compares cars of a similar age. What matters most is the record of the car you are looking at, so check its MOT history before you buy.

What counts as a dangerous defect?

One the tester judges to be a direct and immediate risk to road safety, or to have a serious impact on the environment. The car fails and should not be driven until it is repaired. 2.7% of initial tests on the Porsche Cayman found at least one, against 7.3% for all cars and vans.

Where do these figures come from?

From DVSA's anonymised MOT test data for 2025, published under the Open Government Licence. We count initial tests on cars and light vans in Great Britain, as DVSA does in its own statistics: retests, appeals and abandoned tests are left out, and so are advisories and minor defects.

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