CarCostCheck

PORSCHE CAYMAN (2018)

Running costs, common problems, and reliability data based on 3,611 real MOT tests in 2024.

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MOT Pass Rate

96%

Total Tests (2024)

3,611

Avg Mileage

29,634 mi

Est. Annual Cost

£2,037

Is the 2018 PORSCHE CAYMAN reliable?

Excellent reliability. Very few MOT failures. That's 14 points above the national average of 82%. It also outperforms the PORSCHE brand average of 92%.

At 6 years old, 96% of PORSCHE CAYMANs from 2018 passed their MOT first time in 2024. That's based on 3,611 tests across the UK. The average mileage at this age is 29,634 miles.

How does the 2018 PORSCHE CAYMAN compare?

Rank among all 2018 cars82th out of 649(top 13%)
Rank among all PORSCHE models70th out of 276(top 25%)
vs national average+14% (82% avg)
vs 2018 cars average+7% (89% avg)
vs PORSCHE average+4% (92% avg)

Mileage Analysis

The average 2018 PORSCHE CAYMAN has 29,634 miles on the clock, which is below the expected 44,400 miles for a 6-year-old car. This suggests lighter use than average, which generally means less wear on major components.

Best year to buy a PORSCHE CAYMAN?

The most reliable year is the 2022 model with a 100% MOT pass rate, while the 2006 model has the lowest at 86%. The 2018 sits between the two at 96%.

How much does a 2018 PORSCHE CAYMAN cost to run?

⛽Fuel (Petrol, 2497cc)
£1,592
🏛️Road Tax
£190
🔧MOT Test
£55
🛠️Predicted Repairs
£200
Total per year£2,037
Per month£170/mo

Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT pass rate data. Insurance not included.

PORSCHE CAYMAN by Year

YearPass RateTestsAvg Mileage
2022100%6010,562 mi
202197%1,23016,318 mi
202097%1,42117,106 mi
201995%2,63523,973 mi
201896%3,61129,634 mi
201795%2,74732,888 mi
201696%2,72530,854 mi
201596%2,77436,438 mi
201494%2,96349,014 mi
201395%2,27050,622 mi
201296%69151,012 mi
201192%1,16754,736 mi
201090%1,20167,244 mi
200993%1,46667,126 mi
200889%2,31274,137 mi
200788%3,10077,221 mi
200686%3,42480,301 mi
200589%36184,339 mi

Checking a specific PORSCHE CAYMAN?

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About the 2018 PORSCHE CAYMAN

The 2018 PORSCHE CAYMAN is a luxury with a 2497cc petrol engine. 3,611 of these vehicles were MOT tested in 2024, making it a reasonably common sight on UK roads. It ranks in the top 13% of all 2018 cars for reliability.

With an average of 29,634 miles at 6 years old, PORSCHE CAYMAN owners tend to use this car less than the typical driver.

2018 PORSCHE CAYMAN Fuel Costs

The 2497cc petrol engine offers a reasonable balance between performance and economy. Expect around 30 mpg in mixed driving, which works out to roughly £1,592 per year at current petrol prices of 142p per litre (based on 7,400 miles per year).

What does it cost to own a 2018 PORSCHE CAYMAN?

Total estimated annual running cost is £2,037 (£170/month), broken down as £1592 fuel, £190 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 96% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.

PORSCHE CAYMAN Reliability Trend

Newer PORSCHE CAYMANs show better MOT pass rates than older ones, with an average improvement of 5 percentage points.

Buying a Used 2018 PORSCHE CAYMAN

At 6 years old, the PORSCHE CAYMAN offers good value with plenty of life remaining. Most manufacturer warranties will have expired, so a pre-purchase inspection is worth the cost. If you're flexible on year, the 2022 model has the highest pass rate at 100%.

Alternatives to the 2018 PORSCHE CAYMAN

The PORSCHE CAYMAN is actually the most reliable option among similar petrol luxurys from this era. Here are comparable petrol cars with similar engines: