Make overview
Porsche MOT pass rates by model
Data updated
Quick answer
Porsche cars pass 87.5% of MOT tests across 188,145 recorded tests, against a national average of 72.3%. Of the 14 Porsche models with MOT data, the Macan has the highest age-adjusted pass rate at 89.5% and the Cayenne the lowest at 85.3%. The item recorded most often on a failed Porsche is tyre tread depth not in accordance with the requirements.
- Tests analysed
- 188,145
- Adjusted pass rate
- 87.8%
- Models with data
- 14
Adjusted for age and mileage
Porsche models ranked by pass rate
| Model | Adjusted pass rate | National rank | Tests |
|---|---|---|---|
| Porsche Macan | 89.5% | 2 of 262 | 35,055 |
| Porsche 911 | 89.5% | 3 of 262 | 51,870 |
| Porsche Panamera | 87.8% | 10 of 262 | 7,466 |
| Porsche Cayman | 87.2% | 12 of 262 | 14,702 |
| Porsche Boxster | 85.7% | 16 of 262 | 32,281 |
| Porsche Cayenne | 85.3% | 18 of 262 | 31,777 |
Unadjusted, not ranked
Other Porsche models with MOT data
These models have at least 500 recorded tests, but their tested examples do not span enough ages and mileages to rank fairly. Their failure and advisory patterns are still drawn from real tests.
| Model | Unadjusted pass rate | Tests |
|---|---|---|
| Porsche Taycan | 91.0% | 7,988 |
| Porsche 944 | 78.2% | 2,114 |
| Porsche Taycan 4S Cross Turismo | 91.0% | 1,273 |
| Porsche 718 Cayman GT4 | 95.6% | 955 |
| Porsche Carrera | 84.5% | 788 |
| Porsche 928 | 81.1% | 650 |
| Porsche 911 GT3 | 96.1% | 622 |
| Porsche Taycan 4 Cross Turismo | 90.9% | 604 |
Across the range
What Porsche cars fail on most
Share of failed Porsche tests recording each item, summed across every model above.
- 1.Tyre tread depth not in accordance with the requirements13.6%
- 2.A tyre seriously damaged11.9%
- 3.A tyre cords visible or damaged9.4%
Tyre ply or cord exposed, or the casing separating explained
- 4.A spring or spring component fractured or seriously weakened9.2%
- 5.Lambda coefficient outside the default limits or the range specified by the manufacturer8.9%
- 6.A transmission shaft constant velocity joint boot missing or no longer prevents the ingress of dirt etc7.5%
Common questions
- What is the MOT pass rate for Porsche?
- Across 188,145 recorded MOT tests, 87.5% of Porsche tests ended in a pass, against a national average of 72.3%. Adjusted for the age and mileage of the cars tested, the figure is 87.8%. A make-level figure blends very different cars, so the individual model pages are the more useful comparison.
- Which Porsche is the most reliable on MOT evidence?
- Of the Porsche models with enough data to compare fairly, the Macan has the highest age-and-mileage-adjusted pass rate at 89.5%, ranking 2 of 262 models nationally. This reflects how often cars meet the MOT standard, not how often they break down.
- What do Porsche cars most often fail their MOT on?
- The most commonly recorded failure item across Porsche tests is "Tyre tread depth not in accordance with the requirements", appearing in 13.6% of failed tests. One failed test can list several items, so these shares do not add up to 100%.
- Why do some Porsche models not have a pass rate ranking?
- A model is only ranked when its tested examples cover a wide enough spread of ages and mileages for a fair comparison. 6 of the 14 Porsche models here qualify. For the rest we publish the unadjusted rate and the failure patterns, but not a rank, because comparing unadjusted rates mostly sorts cars by how new they are.
How to read these figures
Why the adjusted rate is the fair one
An unadjusted pass rate is strongly driven by the age and mileage of the cars being tested, not by how well they were built. A model bought mainly as a lightly used second car will look better than an identical car sold to high-mileage drivers. Adjusting for age and mileage compares each model against cars that have lived a similar life.
For a specific car, its own record beats any model average — check that vehicle’s MOT history and read what testers actually recorded against it.
Check any vehicle's MOT history
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