Is the 2018 PORSCHE CAYMAN reliable?

Excellent reliability. Very few MOT failures. 96% of PORSCHE CAYMANs from 2018 passed their MOT first time in 2026, based on 3,611 tests. That's 14 points above the national average of 82%.

How much does a 2018 PORSCHE CAYMAN cost to run?

Estimated annual running cost is £2,042 (£170/month), including £1592 fuel, £195 road tax, £55 MOT, and £200 predicted repairs.

What is the MOT pass rate for a 2018 PORSCHE CAYMAN?

The 2018 PORSCHE CAYMAN has a 96% MOT pass rate based on 3,611 tests in 2026. This ranks 82 out of 649 cars from 2018.

Which year PORSCHE CAYMAN is most reliable?

The 2022 PORSCHE CAYMAN has the highest MOT pass rate at 100%. The least reliable year is 2006 at 86%.

PORSCHE CAYMAN (2018)

Q: What is the average mileage for a 2018 PORSCHE CAYMAN?

The average mileage for a 2018 PORSCHE CAYMAN is 29,634 miles, which is below the expected 59,200 miles for a 8-year-old car. This suggests lighter use than average, which generally means less wear on major components.

Running costs, reliability data, and common problems from 3,611 real MOT tests.

Annual Cost

£2,042

£170/month

MOT Pass Rate

96%

Excellent

Road Tax

£195

Flat rate/year

Insurance

Grp 25-38

2497cc Petrol

Great Choice

96% pass rate, £2042/year to run. 14 points above average.

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Petrol2497cc8 years old3,611 tests30k miles avg

Annual Running Costs

Fuel (Petrol, 2497cc)

~30 mpg

£1,592

Road Tax

Flat rate (post-2017)

£195

MOT Test

£55

Predicted Repairs

Low estimate due to excellent reliability

£200

Total per year£2,042

Per month£170/mo

Per week£39/wk

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

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Reliability Verdict

96% MOT pass rate(Excellent)

0%National avg: 82%100%

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 8 years old, 96% of PORSCHE CAYMANs from 2018 passed their MOT first time in 2026. That's based on 3,611 tests across the UK. The average mileage at this age is 29,634 miles.

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How Does It Compare?

Rank among 2018 cars82th of 649(top 13%)

Rank among PORSCHE models70th 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

29,634

Average miles

59,200

Expected for age

The average 2018 PORSCHE CAYMAN has 29,634 miles on the clock, which is below the expected 59,200 miles for a 8-year-old car. This suggests lighter use than average, which generally means less wear on major components.

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Best Year to Buy?

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%.

PORSCHE CAYMAN by Year

Year	Pass Rate	Tests	Avg Mileage
2022	100%	60	10,562 mi
2021	97%	1,230	16,318 mi
2020	97%	1,421	17,106 mi
2019	95%	2,635	23,973 mi
2018	96%	3,611	29,634 mi
2017	95%	2,747	32,888 mi
2016	96%	2,725	30,854 mi
2015	96%	2,774	36,438 mi
2014	94%	2,963	49,014 mi
2013	95%	2,270	50,622 mi
2012	96%	691	51,012 mi
2011	92%	1,167	54,736 mi
2010	90%	1,201	67,244 mi
2009	93%	1,466	67,126 mi
2008	89%	2,312	74,137 mi
2007	88%	3,100	77,221 mi
2006	86%	3,424	80,301 mi
2005	89%	361	84,339 mi

Similar Cars to Consider

VOLVO XC40

2020 · 2000cc Petrol

£1,772/year

93%

-3%

LAND ROVER RANGE ROVER SPORT

2018 · 2995cc Petrol

£2,037/year

93%

-3%

MERCEDES GLC

2019 · 2996cc Petrol

£2,037/year

93%

-3%

JAGUAR F-PACE

2017 · 1997cc Petrol

£1,772/year

90%

-6%

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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 2026, 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 8 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 £2,042 (£170/month), broken down as £1592 fuel, £195 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 8 years old, this is a solid used buy if you find one with good service history. Depreciation has levelled off, so you won't lose much more value. Focus on condition over mileage. If you're flexible on year, the 2022 model has the highest pass rate at 100%.

Common Issues to Watch For

Based on the 2018 PORSCHE CAYMAN's fuel type, age, and engine size, these are the most likely problem areas to check.

Timing Chain / Belt

Watch out

At 8 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 risk

Larger petrol engines can develop higher oil consumption as they age. Check the oil level and look for blue smoke from the exhaust.

Suspension Wear

Medium risk

Shock absorbers, springs, and anti-roll bar links typically need attention around this age. Listen for clunks over bumps and check for uneven tyre wear.

Service History

Low risk

Always 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 2018 PORSCHE CAYMAN stacks up against similar cars for annual running costs, insurance, and tax.

Car	Pass Rate	Fuel/yr	Tax/yr	Insurance	Total/yr
PORSCHE CAYMAN(2018)	96%	£1592	£195	Grp 25-38	£2042
VOLVO XC40(2020)	93%	£1327	£190	Grp 18-32	£1772-£270
LAND ROVER RANGE ROVER SPORT(2018)	93%	£1592	£190	Grp 30-42	£2037-£5
MERCEDES GLC(2019)	93%	£1592	£190	Grp 30-42	£2037-£5
JAGUAR F-PACE(2017)	90%	£1327	£190	Grp 18-32	£1772-£270

Estimates based on 7,400 miles/year, current fuel prices, and MOT data. Insurance groups are indicative. Actual costs vary by driver, location, and usage.