Should I check the MOT history before buying a 2018 Porsche Cayman?

Yes. Look for recurring advisories — slow-building issues like corrosion or brake wear patterns show up years before they become failures. A full MOT history analysis will highlight patterns that a single test result won't reveal.

What corrosion should I look for when inspecting a 2018 Porsche Cayman?

Check brake pipes, sills, subframes, and chassis legs. Surface rust is normal at this age; structural rust is a serious problem that is expensive to fix and can fail an MOT.

How are tyres and brakes typically on a 2018 Porsche Cayman?

Tyres and brakes are the most common advisory items on vehicles of this age. Budget for replacement if they are near the limit, and factor this into your offer price.

Is the 2018 Porsche Cayman reliable?

Based on MOT data from 1,424 vehicles, the 2018 Porsche Cayman has a first-time MOT pass rate of 95%, indicating generally reliable for its class. Always check the full MOT history of any specific vehicle before buying.

What are common problems with the 2018 Porsche Cayman?

The most frequently recorded MOT issues on the 2018 Porsche Cayman are: Nearside Rear Tyre worn close to legal limit/worn on edge (24.3% of vehicles), Offside Rear Tyre worn close to legal limit/worn on edge (23.2% of vehicles), Offside Front Tyre slightly damaged/cracking or perishing (20.3% of vehicles). These figures are based on actual MOT test records — search a specific registration on CarHunch to see its individual history.

Do I need an HPI check when buying a 2018 Porsche Cayman?

Yes. The MOT history will not show outstanding finance, insurance write-offs, or stolen status. An HPI check covers these areas and should be part of any used car purchase.

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Porsche Cayman (2018)

1,424 real MOT outcomes analysed • 95% first-time pass rate

2018 Porsche Cayman

CarHunch analysed 1,424 real MOT records for the 2018 Porsche Cayman. Real test outcomes — pass rates, defect profiles, mileage data — from verified DVLA records. Updated as new MOTs are recorded.
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AI Analysis Reliability Overview Common Issues Check a Specific Reg Buyer's Checklist Mileage Distribution Still on the Road MOT Averages Colour Breakdown Compare Models

The 2018 Porsche Cayman passes its MOT first time at 87.9%, well above the UK average of 80%, and only 12.3% of cars have ever recorded a dangerous defect—a reassuring sign for a sports car of this age. This is a genuinely reliable cohort with an average of just 0.29 failures per vehicle, suggesting owners are either maintaining these cars diligently or the platform is simply well-engineered.

The median mileage of 21,769 miles is notably low for a six-year-old car, indicating these are cherished weekend or second cars rather than daily drivers, which partly explains the strong MOT performance. Before you buy, have an independent inspection focus on the cooling system and suspension—the 2.3 average advisories per car suggest these are the typical wear items on Caymans—because specialist repairs on this brand will hurt your wallet if neglected.

The 2018 Porsche Cayman passes its MOT first time more often than most UK vehicles (95% vs ~80% average) — and when it does fail, it's usually something minor and cheap to fix.

⚠️ Around 1 in 8 of these vehicles have had a dangerous MOT failure at some point — usually tyres or brakes, and often a one-off issue rather than a persistent problem. The group stats won't tell you which one you're looking at.

First-time pass

95%

UK average ~80%

Better than average

Dangerous (ever)

12.3%

At least once in MOT history

Check this vehicle

Avg failures / car

0.29

Over 4.8 tests on record

Low

Typical mileage

22k

Middle half: 15k–30k

For context

✅ Good baseline reliability. A 95% first-time pass rate puts this well above the UK average — it's a well-sorted vehicle in this age bracket.

🔧 Expect consumable spend. An average of 2.3 advisories per vehicle tells you wear items (tyres, brakes) get flagged regularly. Budget for them — they're not surprises.

🔍 The dangerous defect figure is real. Most are one-off tyre failures or brake issues — not structural problems. But it's exactly why checking the individual vehicle's history is essential, not optional.

These stats describe 1,424 vehicles as a group. The specific vehicle you're looking at could be the one good example or the one outlier. Run its registration to find out.

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What tends to go wrong

Across 1,424 vehicles — figures show how many had each issue flagged at least once in their MOT history.

Tyre wear 24.3%

Nearside Rear Tyre worn close to legal limit/worn on edge · Offside Rear Tyre worn close to legal limit/worn on edge · Offside Front Tyre slightly damaged/cracking or perishing · …

Budget for a full set — on a vehicle this age, tyres are expected consumables. An inspection will confirm how much is left.

Other issues 12.2%

COVID-19 6 MONTH EXTENSION · Windscreen damaged but not adversely affecting driver's view

Brake wear 6.1%

Front Brake pad(s) wearing thin · Front Brake disc worn, pitted or scored, but not seriously weakened

Ask the seller when brakes were last serviced. If they don't know, factor in the cost.

Data covers a 3-year window centred on 2018.

See this vehicle's full MOT history & AI hunches

Spot recurring advisories, hidden issues, and how it compares to 1,424 Porsche Cayman cars.

Before you buy a 2018 Porsche Cayman

Based on MOT data from 1,424 vehicles — here's what to check.

📋 Check the full MOT history. 12.3% of these vehicles have had a dangerous defect recorded - recurring advisories often signal problems years before they become failures.
Search the reg on CarHunch for the full MOT history, reliability stats and a free AI-powered analysis of that exact vehicle.
🔍 Brake pipes, sills and subframes are the key areas on a vehicle this age — structural rust is hard to spot without getting underneath. A mechanic will check all of this before you commit, and give you a concrete basis to negotiate on price. Inspection →
📄 Outstanding finance, insurance write-offs and clocking won't appear in the MOT records — a dedicated history check covers all of this. Our link gets you 20% off automatically. History Get 20% off via CarHunch

Colour Breakdown

Based on 17,092 Porsche Cayman vehicles registered in the UK — across all years. From DVLA registration records.

Black 22.2%

3,794

Grey 18.7%

3,199

Silver 15.6%

2,672

Blue 14.9%

2,543

White 12.1%

2,073

Red 11.1%

1,900

Yellow 2.5%

429

Green 1.6%

268

Orange 0.8%

138

Brown 0.3%

Purple 0.1%

Multi-colour 0%

Mileage Distribution

Most 2018 Porsche Cayman vehicles sit in the blue band. If the vehicle you're looking at is outside it, it's either unusually low or high mileage for its age.

21,769

typical

15,309

low mileage

29,816

high mileage

Half of all 2018 Porsche Cayman vehicles fall between 15,309 and 29,816 miles.

Is the mileage you're seeing normal?

✓ Under 15,309 miles — lower than most. Could be great, or could be a vehicle that rarely moved. Check test frequency and mileage progression in the MOT history.

✓ 15,309–29,816 miles — normal for age. This is where most 2018 Porsche Caymans sit.

⚠ Over 40,251 miles — higher than typical. Not necessarily a problem, but check service history and look out for advisory build-up on tyres and brakes.

2018 Porsche Cayman — Still on the Road

Almost all 2018 Porsche Caymans are still on the road.

Strong survival — 1,113 vehicles still getting MOTs in 2025, 90% of the peak.

Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2020–2025.
* The 2020 dip reflects the government's COVID-19 MOT exemption, which allowed certificates to be extended by six months — fewer tests were conducted that year.

MOT History Averages

4.8

Avg MOT tests per vehicle

0.29

Avg failures per vehicle

2.3

Avg advisories per vehicle

Other model years — Porsche Cayman: All Cayman years → Which year to buy? →

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