MOT data by first-use year
2006 Porsche Cayman: MOT fail rate and common problems
DVSA MOT tests 2022–2025 · 6,046 MOT tests · Updated
21.6% of 2006 Porsche Cayman cars failed their MOT at 18 years; measured against vehicles the same age and test year, about the same as the 2007 cars (4,590 MOT tests) [1].
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- −21.3 to −22.1 points: the gap to all class 4 vehicles the same age and test year, from 16 to 19 years, 6,046 MOT tests
- At 19 years (tested 2025): 20.5% failed, against 42.6% for all class 4 vehicles tested at 19 years in 2025, 1,456 MOT tests
- At 18 years (tested 2024): 21.6% failed, against 43.4% for all class 4 vehicles tested at 18 years in 2024, 1,484 MOT tests
Engine, fuel and mileage decide where one vehicle sits within these figures. Check the reg first.
Figures are for 2006 Porsche Cayman cars as a group, not for one car.
- Fail rate at 18 years (2024)
- 21.6%
- vs 43.4% for all class 4 vehicles tested at 18 years in 2024
- 1,484 MOT tests
- Gap to all class 4, same age and year
- −21.5 pts
- over ages 16–19: −22.1 to −21.0 pts
- 6,046 MOT tests
- Against the 2007 cars
- +1.1 pts
- 95% range −1.9 to +4.0 pts, same ages, each against its own test year
- 4,590 MOT tests
- MOT tests of 2006 cars
- 6,046
- tested 2022–2025, 4 ages with 1,000+ tests
- 6,046 MOT tests
About the same as the 2007 cars: +1.1 points at the same ages (16–18), each year against all class 4 vehicles the same age tested in its own year; 95% range −1.9 to +4.0, from 4,590 MOT tests of 2006 cars and 4,261 of the 2007 cars. Not adjusted for mileage.
Every Porsche Cayman year against all class 4 vehicles the same age
2006 Porsche Cayman fail rate at each MOT
From 2022 to 2025, as these cars went from 16 to 19 years old, the fail rate went from 22.3% to 20.5%, and the gap to all class 4 vehicles the same age and test year from −21.3 to −22.1 points. The widest gap was at 18 years (−21.8 points, 1,484 MOT tests).
| Test year | Age | Fail rate | 95% range | MOT tests | All class 4, same age and year | Gap |
|---|---|---|---|---|---|---|
| 2022 | 16 years | 22.3% | 20.3%–24.5% | 1,572 | 43.6% | −21.3 pts |
| 2023 | 17 years | 22.4% | 20.4%–24.6% | 1,534 | 43.4% | −21.0 pts |
| 2024 | 18 years | 21.6% | 19.6%–23.8% | 1,484 | 43.4% | −21.8 pts |
| 2025 | 19 years* | 20.5% | 18.5%–22.6% | 1,456 | 42.6% | −22.1 pts |
* Above 18 years only survivors are still tested, so these rows say less about the vehicle when new and do not count towards the verdict.
All class 4: every class 4 vehicle (cars and light vans) tested at that age in the same test year.
2006 against the 2007 cars, age by age
| Age | 2006 | Years either side |
|---|---|---|
| 16 years | 22.3% 1,572 MOT tests, tested 2022 | 2007: 20.7% (1,449, tested 2023) |
| 17 years | 22.4% 1,534 MOT tests, tested 2023 | 2007: 20.4% (1,410, tested 2024) |
| 18 years | 21.6% 1,484 MOT tests, tested 2024 | 2007: 19.3% (1,402, tested 2025) |
Each year was tested in a different calendar year; the verdict compares each against all class 4 vehicles the same age tested in its own year.
What fails on a Porsche Cayman at 18 years
All Porsche Cayman MOTs at 18 years, cars first used 2005–2007 (3,053 MOT tests; DVSA item counts are not split by first-use year). The most common fail items: side/position light not working (4.8 per 100 MOT tests, a wear item), catalyst emissions: Lambda reading after 2nd fast idle outside specified limits (2.7 per 100 MOT tests) and coil spring broken (1.7 per 100 MOT tests).
No item fails at a clearly different rate from all class 4 vehicles the same age across 3 or more ages.
Road tax for a 2006 Porsche Cayman
The Vehicle Certification Agency lists 5 petrol versions of the Porsche Cayman in its data from May 2006 to May 2007, from 222 to 262 g/km CO2 [3]. A car first registered from 1 March 2001 to 31 March 2017 is taxed by CO2 band, so that is bands K, L and M: from £445 to £790 a year at the 2026/27 rates [2]. These are the bands for a car registered from 23 March 2006. 4 of the listed versions are over 225 g/km: a car like that registered before 23 March 2006 pays band K (£445 a year) instead.
| Band | 12 months | CO2 g/km | Versions listed |
|---|---|---|---|
| K | £445 | 222 | 1 |
| L | £760 | 227–254 | 3 |
| M | £790 | 262 | 1 |
Versions listed, not cars sold: this does not say how common each band is. The CO2 figure on the car's V5C log book decides its band. Car tax calculator for a 2006 petrol car
Car tax and ULEZ for a 2006 car
A car first registered in the UK in 2006 was issued a 55 (January–February), 06 (March–August) or 56 (September–December) plate, unless it was registered in Northern Ireland (no age identifier) or has since moved to a private plate. An imported one is plated when first registered here, so its plate can be newer than its first-use year. 06 plates
A 2006 car is taxed by its CO2 emissions band (A to M), shown on the V5C logbook. [2]
For the London ULEZ, a 2006 petrol usually meets Euro 4. The Euro standard of the car decides, not the year alone. [4] ULEZ checker
Buying a Porsche Cayman? Check that exact car before the viewing.
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- Model risks for this year and fuel
- What similar cars did at their next MOT
- Repairs ahead
- Viewing checklist
Questions people ask
What is the MOT fail rate of a 2006 Porsche Cayman?
21.6% at 18 years (tested 2024), from 1,484 MOT tests, against 43.4% for all class 4 vehicles tested at 18 years in 2024.
Does the 2006 Porsche Cayman fail more MOTs than the 2007?
1.1 percentage points apart at the same ages (16–18), each against all class 4 vehicles the same age and test year, from 4,590 MOT tests (95% range −1.9 to +4.0), so about the same.
At what ages were 2006 Porsche Cayman cars MOT tested in the data?
4 ages with at least 1,000 MOT tests: 16–19 years, tested 2022–2025, 6,046 MOT tests in all. Ages over 18 are shown but not used for the verdict.
What fails most on a Porsche Cayman at 18 years?
4.8 in 100 MOT tests failed on side/position light not working, the most common fail item (a wear item); the most common non-wear item was catalyst emissions: Lambda reading after 2nd fast idle outside specified limits (2.7 in 100). From 3,053 MOT tests of Porsche Cayman cars first used 2005–2007, not only 2006.
Sources
- Driver and Vehicle Standards Agency, Anonymised MOT tests and results, 2022 to 2025. DVSA MOT data, Open Government Licence v3.0, 6,046 MOT tests. Accessed 7 Oct 2026.
- GOV.UK, Vehicle tax rates. Rules, not drawn from the MOT data.
- Vehicle Certification Agency, Car fuel and emissions data. VCA data, Open Government Licence v3.0.
- Transport for London, Ultra Low Emission Zone. Rules, not drawn from the MOT data.
Cars tested at 18 years are compared with every class 4 vehicle tested at 18 years in the same test year. These rates are not adjusted for mileage. Breakdowns and non-MOT faults are not in this data. How we compare