Pass rate
83.5%
Around average — 11.1 pts ahead of the 72.4% that cars this age and mileage manage.
Across 547 recorded tests.
Typical repair bill £44–£131
2005 Porsche Cayman MOT pass rate
- 2005
- typical 80,537 mi
Most common fault
Brakes
31.6% of faults · 20.9% nationally
mostly worn pads and discs, corroded pipes and a handbrake that will not hold.
Part only £25–£55 for Rigid brake pipes excessively corroded. What fitting it takes →
8.8 pts down across model years — 9.3% in 2006, 0.5% in 2017.
Which year to buy
- Best 2021 96.8% pass
- Avoid 2005 83.5% pass · this year
Across the 18 years on record, a spread of 13.3 points. See every year →
- First-attempt pass
- 81.5%
- Typical mileage
- 81k mi
The 2005 Porsche Cayman MOT pass rate is 83.5% of its MOT tests — 11.1 points ahead of what its age and mileage predict. Brakes is the biggest single reason it fails, at 31.6% of what testers record.
Check your postcode
MOT pass rates are national — type your postcode to see how Porsche Cayman does in your corner of the country.
Expert verdict
Brakes: 1.5× the national share
Brakes make up 31.6% of everything recorded on the 2005 Porsche Cayman, against 20.9% nationally — 10.7 points above. Have the discs and pads measured rather than glanced at, and ask whether the handbrake holds on a slope.
- Beats its own age and mileage. Once you allow for how old and how far these cars have been driven, the expected pass rate is 72.4% and this one manages 83.5% — 11.1 points ahead of what its age and mileage predict.
- When it fails, it costs. Only 17% of this model’s typical repairs come in under £30 in parts — the failures here tend to be the kind that need a garage rather than a bulb.
Written from this page's own figures: fault shares against the national composition, the like-for-like pass rate, and the priced repair list. How these are worked out
Watching a Porsche Cayman? Get an email when these numbers change .
How does the 2005 Porsche Cayman compare?
Cars of this age and mileage average 72.4%, so this figure is 11.1 points ahead of what its age and mileage predict. On a first attempt, before any retests, the figure drops to 81.5%. The median 2005 Porsche Cayman in this dataset had covered 80,537 mi.
Pass rates also shift with the test month: tests recorded October–March passed 85.8% of the time, April–September 81.6%.
The single most recorded failure item is "Catalyst emissions Lambda reading after 2nd fast idle outside specified limits", noted on 3.84% of tests.
- 547 recorded tests behind this page.
- 83.5% overall pass rate, 81.5% on a first attempt.
- Across every year of the Porsche Cayman, the average is 91.0% — best year 2021 (96.8%), worst 2005 (83.5%).
Figures count every completed test on this vehicle-year in the dataset, including retests. See methodology for the exact definition.
This page's data
- Tests analysed
- 547
- Typical mileage (median)
- 80,537 mi
- Make and model
- Porsche Cayman
- Updated
- 2026-11-05
Source: DVSA anonymised MOT test data (2023–2025), OGL v3.0.
Top part to budget for
Emissions Repair
Typically a garage job — get quotes before committing.
Does mileage affect the Cayman MOT pass rate?
Pass rate by odometer reading. Bar lengths start at 73% so small gaps stay visible.
Regional pass rates for the Cayman
| Region | Tests | Pass rate |
|---|---|---|
| South East | 105 | 86.7% |
| North West | 74 | 82.4% |
| South West | 72 | 80.6% |
| East of England | 68 | 85.3% |
| West Midlands | 55 | 81.8% |
| Yorkshire | 46 | 84.8% |
| East Midlands | 35 | 85.7% |
| Scotland | 32 | 75.0% |
| Wales | 26 | 76.9% |
| North East | 22 | 90.9% |
Regions come from the postcode area recorded at the test station. Areas on region borders are assigned to the region with the majority of their population.
What fails a 2005 Cayman
Everything a tester recorded on this vehicle, grouped into the inspection sections that produced it. The notch on each bar is the national share, so you can see at a glance whether this car is unusual or just ordinary.
A test can record several items, so these percentages do not add up to 100%. The exact strings, with prices, are in the full DVSA record at the bottom of this page.
Before your test
Three checks worth doing on a 2005 Cayman
These are not generic tips — they are the faults recorded most often on this exact model, rewritten as things you can check yourself. All three take about ten minutes and cost nothing.
-
Check the exhaust and emissions 3.8% of tests
“catalyst emissions Lambda reading after 2nd fast idle outside specified limits”
Listen for a blow at idle and have someone rev it gently. Then look at the tailpipe smoke: blue is oil, white when warm is coolant, black is over-fuelling. Any of those and the emissions test is the least of it.
-
Check the windscreen 2.9% of tests
“windscreen damaged”
Check the driver’s side of the screen within the swept area for chips and cracks; anything larger than 10mm in the driver’s central view is a fail. Most chips can be resin-repaired for far less than a new screen.
-
Check the coil springs 2.4% of tests
“coil spring fractured or broken”
Look up inside each wheel arch with a torch, all the way round the spring. A snapped spring usually breaks at the very bottom coil, where a quick glance will not reach.
Shares are the proportion of tests on this vehicle that recorded the item, so they overlap: one test can record several.
What it costs to get a 2005 Cayman through its MOT
Across the 10 items that are recorded most often on this model, the average repair comes to £44–£131 — and 17% of those repairs are parts that cost under £30.
- Average repair across the 10 common items
- £44–£131
- Cheapest common item: registration plate lamp(s) inoperative in the…
- £5–£20
- Dearest common item: catalyst emissions lambda reading after 2nd…
- £60–£250
- Common items a careful owner can do at home
- 50%
- Repairs that still cost under £30
- 17%
Estimates from typical UK parts prices, weighted by how often each item appears in 547 MOT tests on this vehicle. They exclude diagnostics, retest fees and garage labour where the part is a DIY fit, and they are not figures from the DVSA dataset. Older and higher-mileage examples cost more than the average. How these estimates are built → · All MOT repair costs → · Cheapest cars to put through a test →
Every year of the Cayman, side by side
18 model years on record, from 2005 to 2022. Across them the pass rate runs from 83.5% to 96.8% — a spread of 13.3 points. The bar under each year is the item that failed it most often.
- 2005 83.5%catalyst emissions lambda reading…
- 2006 83.8% catalyst emissions lambda reading…
- 2007 85.3% position lamp not working
- 2008 84.8% position lamp not working
- 2009 90.3% windscreen damaged but not…
- 2010 89.9% windscreen damaged but not…
- 2011 91.0% windscreen damaged but not…
- 2012 93.4% windscreen damaged but not…
- 2013 92.7% windscreen damaged but not…
- 2014 93.2% windscreen damaged but not…
- 2015 94.7% windscreen damaged but not…
- 2016 94.8% windscreen damaged but not…
- 2017 94.6% windscreen damaged but not…
- 2018 94.7% windscreen damaged but not…
- 2019 95.1% windscreen damaged but not…
- 2020 96.1% windscreen damaged but not…
- 2021 96.8% windscreen damaged but not…
- 2022 96.1% tread depth below requirements of…
Colour is the pass rate on a fixed scale, so a block means the same thing on any model. Each year links to its own page with the full fault breakdown.
Compare the 2005 Porsche Cayman with another year
The raw pass rate mostly measures age. The year comparison adds the like-for-like figure, the mileage bands and the repair bill.
Other 2005 cars with a similar record
- Jaguar XK8 82.0%
- BMW 535 81.8%
- Mercedes-Benz Sl 86.1%
- Subaru Impreza 80.8%
- Toyota Alphard 80.4%
- Lexus IS250 80.2%
Closest pass rates among 2005 cars with at least 2,000 tests, so a small sample cannot flatter itself into the list. See the full rankings: best and worst MOT pass rates.
The full DVSA record for the 2005 Porsche Cayman 10 failure items · 6 advisories · 10 inspection categories · mileage brackets · all of it in the page, none of it above the fold
Every inspection category
Shares of the 797 individual items recorded on this vehicle, and the same share across all cars nationally. A single test can record several items, so a row is not a percentage of tests.
| Category | Items | This car | Nationally | Difference |
|---|---|---|---|---|
| Brakes | 256 | 31.60% | 20.89% | +10.71 |
| Tyres | 131 | 16.20% | 19.76% | −3.56 |
| Suspension | 118 | 14.60% | 20.98% | −6.38 |
| Lamps, reflectors and electrical equipment | 91 | 11.20% | 12.21% | −1.01 |
| Noise, emissions and leaks | 63 | 7.80% | 5.52% | +2.28 |
| Non-component advisories | 61 | 7.50% | 4.18% | +3.32 |
| Visibility | 26 | 3.20% | 4.97% | −1.77 |
| Steering | 23 | 2.80% | 2.57% | +0.23 |
| Body, chassis, structure | 17 | 2.10% | 5.57% | −3.47 |
| Seat belts and supplementary restraint systems | 11 | 1.40% | 0.82% | +0.58 |
The exact failure items, in the tester's words
| Recorded item | Severity | Tests | Est. cost |
|---|---|---|---|
| Catalyst emissions Lambda reading after 2nd fast idle outside specified limits Noise, emissions and leaks | Major | 3.8% | £60–250 |
| Windscreen damaged but not adversely affecting driver's view Visibility | Minor | 2.9% | £80–200 |
| Coil spring fractured or broken Suspension | Major | 2.4% | £25–65 |
| Registration plate lamp(s) inoperative in the case of multiple lamps or light sources Lamps, reflectors and electrical equipment | Minor | 1.8% | £5–20 |
| Headlamp aim projected beam image is obviously incorrect Lamps, reflectors and electrical equipment | Major | 1.5% | £30–80 |
| Position lamp not working Lamps, reflectors and electrical equipment | Major | 1.5% | £5–25 |
| Rbt (sp) efficiency below requirements Brakes | Major | 1.5% | £45–110 |
| Rigid brake pipes excessively corroded Brakes | Major | 1.5% | £80–180 |
| Ball joint excessively worn Suspension | Major | 1.1% | £18–45 |
| Exhaust system has a major leak of exhaust gases Body, chassis, structure | Major | 0.91% | £45–120 |
Severity is as recorded: Major and Dangerous fail the test outright; Minor and Advisory do not. Costs are estimates from typical UK parts prices — see how they are built.
What testers noted without failing the car
Advisories are the early warnings — the same parts a year or two before they fail. Reading them is how you tell a car that has been maintained from one that has been patched.
| Recorded item | Severity | Tests | Est. cost |
|---|---|---|---|
| Rigid brake pipes excessively corroded Brakes | Advisory | 18.8% | £80–180 |
| Brake discs in such a condition that it is seriously weakened Brakes | Advisory | 12.6% | £45–110 |
| Has a tear, caused by separation or partial failure of its structure Tyres | Advisory | 10.2% | £45–95 |
| Tread depth below requirements of 1.6mm Tyres | Advisory | 9.3% | £45–95 |
| Non-component advisories Play in steering rack inner joint(s) Non-component advisories | Advisory | 7.9% | £120–300 |
| Ball joint excessively worn Suspension | Advisory | 6.0% | £18–45 |
Pass rate by mileage
| Mileage | Tests | Pass rate | Median odometer |
|---|---|---|---|
| 0-30k | 6 | 100.0% | 17,345 mi |
| 30-60k | 111 | 86.5% | 49,867 mi |
| 60-90k | 243 | 83.1% | 76,177 mi |
| 90-120k | 156 | 81.4% | 101,663 mi |
| 120k+ | 29 | 82.8% | 135,707 mi |
Source: 547 recorded tests on this vehicle-year. Every row above is recomputed from the same DVSA extract as the rest of the page — see the methodology.
2005 Cayman MOT questions
What is the MOT pass rate for a 2005 Porsche Cayman?
83.5% of the 547 2005 Porsche Cayman tests in this dataset passed, against a national average of 72.4% for cars first used in 2005. First-attempt pass rate: 81.5%.
What are the most common MOT failures on a 2005 Porsche Cayman?
The three most recorded items are catalyst emissions lambda reading after 2nd fast idle outside specified limits (3.84%), windscreen damaged but not adversely affecting driver's view (2.93%), coil spring fractured or broken (2.38%). Percentages are the share of tests on this vehicle that recorded the item.
Does mileage affect the 2005 Porsche Cayman MOT pass rate?
Yes. Cars under 30,000 miles passed 100.0% of the time, falling to 82.8% for those over 120,000 miles. The median 2005 Porsche Cayman in this dataset had covered 80,537 mi.
Does the season affect the 2005 Porsche Cayman MOT pass rate?
Tests recorded in the winter months (October–March) passed 85.8% of the time; summer months (April–September) passed 81.6%. Brakes, tyres and lights are tested harder in bad weather, but the difference is small on most models.