Porsche 911 — reliability by registration year
1989–2022 · 30 registration years · 47,188 first tests
Registration years
First-attempt MOT results for every 911 registration year with at least 500 first tests in 2025. Pass rates rise with newer cars, so read a year against its neighbours rather than against the top of the table. Years without their own report are listed here with the same figures.
| Year | First tests | First-attempt pass | Incl. PRS | Most common failure |
|---|---|---|---|---|
| 2022 | 2,460 | 95.4% | 96.5% | |
| 2021 | 1,611 | 96.9% | 97.5% | |
| 2020 | 1,429 | 95.7% | 96.4% | |
| 2019 | 2,183 | 94.5% | 95.3% | |
| 2018 | 2,034 | 94.4% | 95.3% | |
| 2017 | 1,786 | 93.6% | 94.7% | |
| 2016 | 1,620 | 94.0% | 95.1% | |
| 2015 | 1,654 | 94.6% | 95.3% | |
| 2014 | 1,479 | 93.3% | 94.5% | |
| 2013 | 1,211 | 95.0% | 95.4% | |
| 2012 | 1,477 | 93.4% | 94.0% | |
| 2011 | 1,247 | 91.5% | 92.2% | |
| 2010 | 1,662 | 90.3% | 91.6% | |
| 2009 | 1,400 | 89.6% | 90.9% | |
| 2008 | 1,754 | 89.1% | 90.4% | |
| 2007 | 2,331 | 87.4% | 89.3% | |
| 2006 | 2,586 | 86.5% | 88.6% | Catalyst emissions 19.3% |
| 2005 | 2,641 | 86.0% | 88.3% | Catalyst emissions 20.6% |
| 2004 | 2,303 | 84.4% | 86.8% | Catalyst emissions 19.4% |
| 2003 | 2,429 | 80.9% | 83.6% | Catalyst emissions 17.7% |
| 2002 | 2,221 | 80.2% | 83.6% | Catalyst emissions 15.5% |
| 2001 | 1,408 | 83.0% | 85.4% | |
| 2000 | 867 | 80.5% | 84.4% | |
| 1999 | 1,106 | 80.2% | 82.7% | |
| 1998 | 912 | 81.8% | 84.2% | |
| 1997 | 685 | 87.7% | 91.1% | |
| 1996 | 911 | 88.8% | 89.9% | |
| 1995 | 609 | 87.8% | 89.7% | |
| 1990 | 650 | 86.9% | 89.2% | |
| 1989 | 522 | 85.6% | 87.7% |