Porsche Cayman S (2006)
Estimated running costs and MOT pass rates from 98 MOT tests in 2024.
Annual Cost
£3,153
£263/month
MOT Pass Rate
81%
Good
Road Tax
£790
Estimated/year
Est. Insurance
Grp 35-50
3387cc Petrol
Solid Option
81% pass rate, £3,153/year to run. Close to the average across all models.
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Annual Running Costs
~30 mpg
Estimated CO2 band
Estimates based on 7,400 miles/year (UK average), petrol at 174.57p a litre (GOV.UK weekly average, week of 19 October 2026), GOV.UK road tax rates and repair likelihood from MOT data. Insurance not included.
Reliability Verdict
Good reliability. Occasional issues but generally solid. That's close to the average of 82% across all models in our data. It falls below the Porsche brand average of 92%.
81% of MOT tests on Porsche Cayman Ss from 2006 ended in a pass in 2024, when they were about 18 years old. That's based on 98 tests across the UK, retests included. The average mileage recorded at those tests was 71,772 miles.
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How Does It Compare?
Mileage Analysis
71,772
Average miles
133,200
Expected for age
The average 2006 Porsche Cayman S had 71,772 miles on the clock at its 2024 MOT, which is below the expected 133,200 miles for a 18-year-old car. This suggests lighter use than average, which generally means less wear on major components.
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Porsche Cayman S by Year
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About the 2006 Porsche Cayman S
The 2006 Porsche Cayman S is a luxury car. Our records list a 3387cc petrol engine, though engines vary between versions. 98 MOT tests were recorded on this model in 2024, making it a rare model on UK roads. It ranks in the top 25% of all 2006 models for MOT pass rate.
With an average of 71,772 miles recorded at its 2024 MOT tests, Porsche Cayman S owners tend to use this car less than the typical driver.
2006 Porsche Cayman S Fuel Costs
The 3387cc petrol engine is on the larger side, so fuel won't be this car's strong point. Expect around 30 mpg in mixed driving, which works out to roughly £1,958 per year with petrol at 174.57p per litre (GOV.UK weekly average, week of 19 October 2026; based on 7,400 miles per year).
What does it cost to own a 2006 Porsche Cayman S?
Total estimated annual running cost is £3,153 (£263/month), broken down as £1,958 fuel, £790 road tax, £55 MOT, and £350 predicted repairs. Repair costs are moderate, reflecting the 81% pass rate. Keeping on top of servicing will help avoid surprises.
Buying a Used 2006 Porsche Cayman S
At 20 years old, the Porsche Cayman S is firmly in budget territory. Purchase prices are low, but check for rust, worn suspension bushes, and electrical gremlins. A full service history is especially valuable at this age. Note: with only 98 tests in our data, these figures should be treated as indicative rather than definitive.
Common Issues to Watch For
These are typical issues for cars of this age, fuel type and engine size, not faults recorded on this model's MOT tests. Use them as a checklist when you view one.
Timing Chain / Belt
Watch outAt 20 years old, check whether the timing belt has been replaced (typically due every 5-7 years or 60,000-100,000 miles). A snapped belt can destroy the engine.
Oil Consumption
Medium riskLarger petrol engines can develop higher oil consumption as they age. Check the oil level and look for blue smoke from the exhaust.
Rust and Corrosion
Watch outAt 10+ years, check wheel arches, sills, subframe, and brake lines for rust. Structural corrosion is an MOT failure. Prevention is far cheaper than repair.
Suspension Bushings
Watch outRubber suspension bushes harden and crack with age, causing knocking noises and vague handling. A full refresh costs £300-£800 depending on the car.
Service History
Low riskAlways request a full service history. Regular servicing is the single best indicator of how well a car has been maintained, regardless of mileage.
Running Costs Compared
How the 2006 Porsche Cayman S stacks up against similar cars for estimated annual running costs, insurance group, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Est. Ins. Group | Total/yr |
|---|---|---|---|---|---|
| Porsche Cayman S(2006) | 81% | £1,958 | £790 | Grp 35-50 | £3,153 |
| Land Rover Freelander(2007) | 75% | £1,958 | £790 | Grp 35-50 | £3,303+£150 |
| Mercedes E(2004) | 78% | £1,958 | £790 | Grp 35-50 | £3,303+£150 |
| Mercedes CLK(2007) | 76% | £1,958 | £445 | Grp 30-42 | £2,958-£195 |
| Jaguar X-Type(2007) | 71% | £1,958 | £445 | Grp 30-42 | £2,958-£195 |
Estimates based on 7,400 miles/year, GOV.UK average pump prices for the week of 19 October 2026, GOV.UK road tax rates and MOT data. Insurance groups are our rough estimate from engine size, not official groups. Actual costs vary by driver, location, and usage.
Questions about the 2006 Porsche Cayman S
Is the 2006 Porsche Cayman S reliable?
Good reliability. Occasional issues but generally solid. 81% of MOT tests on 2006 Porsche Cayman Ss ended in a pass, from 98 tests (DVSA MOT data for tests in 2024, retests included). That's 1 point below the average of 82% across all models in the same data.
How much does a 2006 Porsche Cayman S cost to run?
Our estimate is £3,153 a year (£263 a month): £1,958 fuel, £790 road tax, £55 MOT and £350 predicted repairs, based on 7,400 miles a year. Insurance is not included.
What is the MOT pass rate for a 2006 Porsche Cayman S?
81% of 98 MOT tests on the 2006 Porsche Cayman S ended in a pass (DVSA MOT data for tests in 2024, retests included). That ranks it 138th of 554 models first registered in 2006 (top 25%).
What is the average mileage for a 2006 Porsche Cayman S?
The average mileage recorded at MOT tests on the 2006 Porsche Cayman S is 71,772 miles, which is below the expected 133,200 miles for a 18-year-old car. This suggests lighter use than average, which generally means less wear on major components.
Related Porsche Models
Explore other Porsche cars or similar models in the same category.
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Land Rover Freelander
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Mercedes E
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Mercedes CLK
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