MOT pass rates / Porsche
Porsche MOT pass rates and common failures
Porsche cars passed 86.6% of their MOTs first time in 2024, across 142,110 class-4 initial tests and 7 model groups. That is above the 71.2% UK average, and ranks Porsche 8th of 59 makes in the dataset.
Pass rates track age more strongly than badge: an older Porsche is compared here against older cars of every other make, so read the age table below before drawing conclusions about the brand.
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Make-level pass rates cannot reveal the condition or provenance of one car.
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What Porsche cars fail on
The items most often behind a first-test failure across Porsche model groups, as a share of Porsche tests. DVSA publishes each model group's six most common categories, so this ranks the biggest published causes rather than every possible one.
- Condition — 2.5% of Porsche tests. Corrosion, damage or wear on a tested component. Worth seeing in person, as the cost ranges from trivial to structural.
- Exhaust Emissions — 2% of Porsche tests. The car exceeded its emissions limits. Can be a sensor or a service, but on a diesel it can also mean an expensive filter or catalyst.
- Headlamp Aim — 1.8% of Porsche tests. Headlights pointing too high or low. Cheap to adjust, and common on every make.
- Springs — 0.8% of Porsche tests. A broken or sagging coil spring. Replaced in pairs, so it is not the cheapest failure.
- Tread Depth — 0.7% of Porsche tests. Tyres below the 1.6mm legal limit. Budget for tyres, and treat it as a sign of how the car was maintained.
- Rigid Brake Pipes — 0.7% of Porsche tests. Corroded brake pipes. Safety-critical and a sign of underbody corrosion.
- Transmission — 0.5% of Porsche tests. A fault with a driveshaft, gaiter or transmission component. Costs vary widely.
- Brake Performance — 0.5% of Porsche tests. The brakes underperformed on the rolling road. Expect brake work rather than an adjustment.
Porsche MOT pass rate by age
| Age at test | Tests | Initial pass rate |
|---|---|---|
| 3–5 years | 25,290 | 93.3% |
| 6–9 years | 41,121 | 90.3% |
| 10–14 years | 24,475 | 87.8% |
| 15–30 years | 51,148 | 79.8% |
Porsche models by MOT pass rate
| Model | Tests | Initial pass rate |
|---|---|---|
| 911 | 37,427 | 87.5% |
| Boxster | 29,135 | 82.3% |
| Macan | 28,528 | 90.8% |
| Cayenne | 26,612 | 84.2% |
| Cayman | 13,062 | 88.5% |
| Panamera | 5,898 | 87.8% |
| Taycan 4S 93kwh | 1,448 | 91.6% |
Methodology and limitations
MOT outcomes describe testable items at the time of inspection. They are not a measure of overall mechanical reliability.
Scope: Class 4 normal initial MOT tests completed in 2024. Models require at least 1,000 qualifying tests. Duplicate source rows are removed using official DVSA test IDs.
Source: Driver and Vehicle Standards Agency anonymised MOT tests and results, 2024, published 2025-05-23 under the Open Government Licence v3.0.
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