MOT performance
Porsche MOT pass rates and common failures
Across 346,550 MOT tests of Porsche cars in 2023–2024, 86.5% passed first time. Allowing for age, mileage and fuel, Porsches failed 50% less often than comparable cars. Of the 6 Porsche models with enough tests, the Porsche 911 failed least often relative to comparable cars.
346,550 MOT tests on 185,519 vehicles, 2023–2024 · Source: DVSA (Open Government Licence) · Analysis: 73 Auto
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| Figure | Value | Basis |
|---|---|---|
| First-time pass rate | 86.5% | ±0.1 pts (95%), n = 346,550 |
| Failures vs similar cars | 0.50× | same age, mileage and fuel = 1.00 |
| Tests with a dangerous defect | 3.4% | n = 346,550 |
| Average age at test | 11.8 years | n = 346,550 |
Porsche models
Every Porsche model with at least 10,000 tests, most-tested first.
| Model | Tests | First-time pass rate | Failures vs similar cars |
|---|---|---|---|
| Porsche 911 | 100,223 | 87.9% | 0.42× |
| Porsche Boxster | 65,604 | 82.2% | 0.55× |
| Porsche Cayenne | 59,466 | 84.2% | 0.56× |
| Porsche Macan | 56,741 | 91.2% | 0.48× |
| Porsche Cayman | 29,543 | 88.9% | 0.43× |
| Porsche Panamera | 14,147 | 87.2% | 0.55× |
Where Porsches fail
| Area | Tests failed on it | vs similar cars |
|---|---|---|
| Lights, reflectors and electrical | 4.6% | -57% |
| Tyres | 3.6% | -34% |
| Brakes | 2.4% | -63% |
| Suspension | 2.2% | -72% |
| Noise, emissions and leaks | 2.1% | -41% |
| Driver's view of the road | 1.8% | -64% |
| Body, chassis and structure | 1.3% | -65% |
| Registration plates and VIN | 0.5% | +43% |
| Steering | 0.4% | -73% |
| Seat belts and airbags | 0.4% | -66% |
| Road wheels | 0.2% | -36% |
| Speedometer and driving controls | 0.0% | -5% |
Most common failure items
| Item | Area | Share of tests |
|---|---|---|
| Tread depth: tread depth below requirements of 1.6mm | Tyres | 1.07% |
| Catalyst emissions: Lambda reading after 2nd fast idle outside specified limits | Noise, emissions and leaks | 1.03% |
| Condition: has a cut in excess of the requirements deep enough to reach the ply or cords | Tyres | 1.02% |
| Coil spring: fractured or broken | Suspension | 0.92% |
| Position lamp: not working | Lights, reflectors and electrical | 0.85% |
| Headlamp aim: too high | Lights, reflectors and electrical | 0.82% |
| Condition: has ply or cords exposed | Tyres | 0.80% |
| Wipers: does not clear the windscreen effectively | Driver's view of the road | 0.71% |
| Joints: constant velocity boot split or insecure, no longer prevents the ingress of dirt | Body, chassis and structure | 0.61% |
| Rigid brake pipes: excessively corroded | Brakes | 0.61% |
Pass rate by age
| Age at test (years) | Tests | First-time pass rate | Failures vs similar cars |
|---|---|---|---|
| 3-4 | 47,133 | 93.5% | -46% |
| 5-6 | 45,521 | 91.8% | -50% |
| 7-8 | 42,365 | 89.7% | -52% |
| 9-10 | 29,700 | 88.2% | -56% |
| 11-12 | 19,905 | 87.5% | -60% |
| 13-15 | 25,495 | 85.9% | -61% |
| 16+ | 119,997 | 79.4% | -45% |
MOT failures where Porsche stands out
Individual failure items that Porsches record clearly more or less often than cars of the same age, mileage and fuel. All Porsche MOT failure patterns.
- Wipers: does not clear the windscreen effectively · 0.30× comparable cars
- Position lamp: not working · 0.38× comparable cars
- Headlamp aim: projected beam image is obviously incorrect · 0.32× comparable cars
- Washers: provides insufficient washer liquid · 0.35× comparable cars
Check a specific Porsche
Enter a UK registration to see that car's own MOT history and what it is likely to cost to own. Your first check is free and shows the vehicle summary and its headline ownership cost. The category-by-category breakdown is part of a paid check.
UK number plate or 17-character VIN
About this data. These are MOT test results, not a measure of mechanical reliability: a car's MOT outcome reflects its condition on the day, which depends on how it has been maintained and driven as well as how it was built. Figures cover class 4 vehicles (cars and light vans), normal tests only (retests excluded), outcomes pass, fail and pass after rectification at the station; vehicles at least 2.5 years old at test. Tests from 2023-01-01 to 2024-12-30. “Compared with similar cars” means compared with the national rate for cars of the same age, mileage band and fuel. Contains public sector information licensed under the Open Government Licence v3.0. Makes and models are matched to 73 Auto's vehicle catalogue; tests that can't be matched are left out rather than guessed. See how the MOT figures are produced.