16.2%
Fluid leak
The vehicle is leaking a fluid — oil, coolant, fuel or hydraulic. A slight seep is common on older cars; a continuous drip is both a road hazard and a sign of something failing.
MOT wording: Oil leak, but not excessive
PorscheUsed-car reliability
How reliable is a used Porsche?
At 7 years old, the average Porsche fails its MOT less often than the average UK car.
MOT fail rate · 7-year-old cars
Porsche8.1%
UK average16.6%
Fails less often than the average 7-year-old car (about 1 in 6 MOTs, 16.6%)
Where to start
The lowest and highest fail rates in the Porsche range
The Porsche models whose MOT tests at 7 years old most and least often ended in a fail. All of them fail less often than the average car this age (about 1 in 6 MOTs, 16.6%).
Lowest fail rates
- 1
Porsche 9115.3%fail rate - 2
Porsche Cayman5.5%fail rate - 3
Porsche Boxster7.3%fail rate
Highest fail rates
- 1
Porsche Cayenne11.1%fail rate - 2
Porsche Panamera9.2%fail rate - 3
Porsche Macan8.7%fail rate
What actually goes wrong
What breaks on Porsche cars
The most common MOT faults across the Porsche range, in plain English. Models with more MOT tests count for more. The percentage is the share of MOT tests on Porsche cars that recorded that defect.
13.4%
Tyre condition
A tyre is worn, cut, damaged or otherwise not fit for the road. Tyres are the only thing connecting the car to the road, so this is always worth taking seriously.
MOT wording: Tyre worn close to the legal limit or worn on the edge
8.9%
Rigid brake pipe
A rigid metal brake pipe is corroded, damaged, kinked, or leaking. These permanently fixed pipes carry pressurised brake fluid — any weakness is a serious safety concern.
MOT wording: Brake pipe corroded or covered in grease
8.0%
Wheel bearing
A wheel bearing is worn or damaged. Wheel bearings let the wheels spin smoothly — when worn, they make a humming or grinding noise and can cause the wheel to wobble.
MOT wording: Wheel bearing has slight play
Across all Porsche models; models with more MOT tests count for more.
The whole range
Every Porsche that ranks, in plain English
For each model, one number: the share of its MOT tests at 7 years old that ended in a fail. Retests count as tests. Lower is better. Every model here fails less often than the UK average (about 1 in 6 MOTs, 16.6%). Only models with enough MOT data at 7 years old are ranked. The rest sit just below, unranked.
6 models
Porsche 911
The lowest 7-year fail rate of any Porsche here.
5.3%fail rate at 7 years old
Porsche Cayman
Among the lower fail rates in the Porsche range at 7 years old.
5.5%fail rate at 7 years old
Porsche Boxster
Among the lower fail rates in the Porsche range at 7 years old.
7.3%fail rate at 7 years old
Porsche Macan
Above the Porsche average, but below the UK average.
8.7%fail rate at 7 years old
Porsche Panamera
Above the Porsche average, but below the UK average.
9.2%fail rate at 7 years old
Porsche Cayenne
Above the Porsche average, but below the UK average.
11.1%fail rate at 7 years old
Fail rates are the share of MOT tests on 7-year-old cars ending in a fail, retests included (DVSA MOT results, 2025). UK average across all makes at the same age: 16.6%. How we count fail rates
Not directly comparable with the figures at 7 years old
Shown unranked. These models don’t have enough MOT data at 7 years old yet. They’re either too new (few cars old enough) or too old (few still on the road). Each is shown at the age with the most tests, so the percentages aren’t directly comparable to the list above.
Too new to rankPorsche 718
4.0%fail rate at 3 years old · 474 MOT tests
Too new to rankPorsche Taycan
8.7%fail rate at 3 years old · 4,967 MOT tests
Too old to rankPorsche 968
12.7%fail rate at 25+ years old · 543 MOT tests
Too old to rankPorsche 928
16.7%fail rate at 25+ years old · 749 MOT tests
Too old to rankPorsche 944
19.0%fail rate at 25+ years old · 2,477 MOT tests
Too old to rankPorsche 924
23.3%fail rate at 25+ years old · 600 MOT tests
Looking at one in particular?
Averages tell you the odds across the range. Enter a number plate to see that car’s own MOT history, its risk rating, and what’s likely to need attention.