Porsche Cayenne (2018)
2018 Porsche Cayenne
CarHunch analysed 2,171 real MOT records for the 2018 Porsche Cayenne.
Real test outcomes — pass rates, defect profiles, mileage data — from verified DVLA records. Updated as new MOTs are recorded.
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The 2018 Porsche Cayenne's first-time MOT pass rate sits bang on the UK average at 79.9%, which looks respectable on the surface—but the hybrid variant is a serious red flag, with only 52.9% passing first time, compared to 82.9% for petrol and 87.5% for diesel engines. The 13.3% rate of dangerous defects is within acceptable range, though worth noting on a luxury SUV where you'd expect better.
At 38,000 miles median (42,500 average), these cars have covered relatively modest distances for their six years on the road, yet they're still racking up 0.47 failures and 3.2 advisories per test on average—suggesting some inherited build quality or maintenance issues rather than just wear. If you're considering one, avoid the hybrid version unless you're prepared for higher repair costs, and prioritise examples with full service history and recent independent inspection, especially on the cooling and suspension systems where advisories cluster.
The 2018 Porsche Cayenne passes its MOT first time more often than most UK vehicles (91.9% vs ~80% average) — and when it does fail, it's usually something minor and cheap to fix.
These stats describe 2,171 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.
What tends to go wrong
Across 2,171 vehicles — figures show how many had each issue flagged at least once in their MOT history.
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 2,171 Porsche Cayenne cars.
Petrol vs Diesel
Pass rate difference of 5.1 percentage points — worth knowing if you're choosing between the two.
Before you buy a 2018 Porsche Cayenne
Based on MOT data from 2,171 vehicles — here's what to check.
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Check the full MOT history.
13.3% 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. -
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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
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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
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Pass Rate by Fuel Type
| Fuel type | Vehicles | Pass rate | Avg failures |
|---|---|---|---|
| Petrol (61%) | 1,316 | 93.3% | 0.38 |
| Diesel (26%) | 555 | 88.2% | 0.8 |
| Hybrid Electric (Clean) (14%) | 300 | 92.9% | 0.27 |
Colour Breakdown
Based on 39,605 Porsche Cayenne vehicles registered in the UK — across all years. From DVLA registration records.
Mileage Distribution
Most 2018 Porsche Cayenne 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.
Half of all 2018 Porsche Cayenne vehicles fall between 29,137 and 48,548 miles.
2018 Porsche Cayenne — Still on the Road
Almost all 2018 Porsche Cayennes are still on the road.
Strong survival — 1,733 vehicles still getting MOTs in 2025, 97% 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
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Compare with another model
See how the 2018 Porsche Cayenne stacks up against a rival.