Porsche Common MOT Problems (2026)
Every Porsche model ranked by MOT fail rate, with the most common issues identified for each. Based on 453,524 real MOT tests.
Average Porsche MOT pass rate: 92%
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See the specific issues found on your car, plus health score and running cost estimates.
92%
Avg pass rate
8%
Avg fail rate
70
Models tested
Porsche Models with the Most MOT Problems
Highest average fail rates across all tested years
| # | Model | Fail Rate | Common Issues | |
|---|---|---|---|---|
| 1 | Porsche 928 S | 21% | Suspension wear, Brake disc corrosion, Structural corrosion | |
| 2 | Porsche Cayman S | 19% | Suspension wear, Brake disc corrosion, Structural corrosion | |
| 3 | Porsche 911 Carrera 4 Tiptronic | 16% | Suspension wear, Brake disc corrosion, Structural corrosion | |
| 4 | Porsche Carrera | 15% | Suspension wear, Brake disc corrosion, Structural corrosion | |
| 5 | Porsche 944 | 13% | Suspension wear, Brake disc corrosion, Structural corrosion |
Most Reliable Porsche Models
Lowest average fail rates; the Porsche models least likely to have MOT problems
| # | Model | Pass Rate | |
|---|---|---|---|
| 1 | Porsche 911 Carrera 2s | 100% | |
| 2 | Porsche 911 Carrera 2 S | 100% | |
| 3 | Porsche 911 Targa 4 Gts | 99% | |
| 4 | Porsche Gt 3 | 100% | |
| 5 | Porsche Cayenne Gts Tiptronic S | 100% |
All Porsche Models by Fail Rate
Every Porsche model and year combination, sorted by fail rate (highest first)
| Model | Year | Pass Rate | Fail Rate | |
|---|---|---|---|---|
| 928 S | 1992 | 72% | 28% | |
| Boxster | 1998 | 78% | 21% | |
| 928 | 1995 | 80% | 20% | |
| 928 S | 1991 | 81% | 19% | |
| Cayman S | 2006 | 81% | 19% | |
| Boxster | 1999 | 81% | 18% | |
| Carrera | 1999 | 82% | 18% | |
| Boxster | 2002 | 82% | 17% | |
| Boxster | 2001 | 83% | 17% | |
| Boxster | 2000 | 82% | 17% | |
| Boxster | 2003 | 82% | 16% | |
| Boxster | 2004 | 83% | 16% | |
| Cayenne | 2007 | 83% | 16% | |
| Boxster | 1997 | 83% | 16% | |
| 928 S | 1990 | 84% | 16% | |
| 911 Carrera 4 Tiptronic | 2002 | 84% | 16% | |
| Cayenne | 2005 | 84% | 15% | |
| Cayenne | 2004 | 84% | 15% | |
| Cayenne | 2003 | 84% | 15% | |
| 944 | 1991 | 83% | 15% | |
| Cayenne Tiptronic S | 2004 | 85% | 15% | |
| 944 | 1990 | 85% | 14% | |
| 968 | 1993 | 85% | 14% | |
| Cayenne Tiptronic S | 2006 | 82% | 14% | |
| Panamera 4s Ehyb Spt Tour Sa | 2021 | 83% | 14% | |
| Boxster | 2005 | 86% | 13% | |
| 911 | 2002 | 86% | 13% | |
| Cayman | 2006 | 86% | 13% | |
| 911 | 1998 | 85% | 13% | |
| Cayenne | 2006 | 86% | 13% | |
| Cayenne | 2008 | 86% | 13% | |
| Panamera D V6 Tiptronic Auto | 2011 | 87% | 13% | |
| 968 | 1992 | 86% | 13% | |
| Boxster 24v S S-a | 2012 | 88% | 13% | |
| 911 | 2003 | 87% | 12% | |
| Boxster | 2006 | 88% | 12% | |
| 911 | 1999 | 87% | 12% | |
| Cayman | 2007 | 88% | 12% | |
| 911 | 2001 | 88% | 12% | |
| 911 | 2000 | 86% | 12% | |
| Cayenne | 2009 | 87% | 12% | |
| Panamera | 2011 | 87% | 12% | |
| 928 | 1990 | 88% | 12% | |
| Carrera | 2003 | 88% | 12% | |
| 911 | 2004 | 88% | 11% | |
| Cayman | 2008 | 89% | 11% | |
| 968 | 1994 | 88% | 11% | |
| Cayman | 2005 | 89% | 11% | |
| Cayenne V6 D Tiptronic | 2012 | 89% | 11% | |
| Panamera 4s E-hybrid S-a | 2021 | 89% | 11% |
Showing top 50 of 224 model/year combinations. View all Porsche models
Porsche MOT FAQ
What are the most common MOT problems on Porsche cars?
The most common MOT problems on Porsche cars vary by model and age, but typically include lighting defects, suspension wear, brake component deterioration, and tyre condition issues. Older Porsche diesels are more prone to exhaust and emissions failures. The 928 S has the highest average fail rate at 21%.
Which Porsche model is the most reliable?
The most reliable Porsche model in our data is the 911 Carrera 2s with an average MOT pass rate of 100%. View all Porsche models for full reliability data.
What is the average MOT pass rate for Porsche?
The average MOT pass rate for Porsche is 92%, based on 453,524 MOT tests across 70 models. This means about 8% of Porsche cars fail their MOT on the first attempt.
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