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Porsche 911 2004 reliability and quality

Production year from 2004 to 2008

According to yearly reports of vehicle inspection service Porsche 911 reliability is very high.

During regular inspections from 2006 to 2020 in average failures were found for approximately only 7.3 percents of Porsche 911.
The most recent data available is for 2020, when the average defect rate for a 15-year-old Porsche 911 was 11.1 percent, the average for a car that age was 29.5 percent. So in terms of reliability, Porsche 911 has performed very well, or more reliable than 100% of the other cars tested.

The quality comes at a price - used Porsche 911 is around 300 percent more expensive than the average coupes of its age.

Porsche 911 price and technical data
Coupes 2004 - 2008 prices

Year of inspection Age of car Failures found %
/ average for same age cars		 Place in rating
Porsche 911 2008
2020 12 years 11.1% / 29.51% 1. from 99
2019 11 years 11.7% / 28.39% 1. from 96
2018 10 years 10.6% / 21.77% 1. from 107
2017 9 years 9.9% / 20.90% 1. from 106
2016 8 years 8.9% / 19.10% 1. from 116
2015 7 years 10.5% / 20.10% 1. from 111
2014 6 years 9.2% / 14.80% 9. from 122
2013 5 years 5.8% / 10.80% 9. from 121
2012 4 years 3.4% / 5.90% 11. from 129
2011 3 years 2.3% / 5.50% 2. from 132
2010 2 years 1.9% / 5.10% 1. from 131
Porsche 911 2007
2019 12 years 11.7% / 28.39% 1. from 96
2018 11 years 12.2% / 26.89% 1. from 93
2017 10 years 9.9% / 20.90% 1. from 106
2016 9 years 11.7% / 24.90% 1. from 102
2015 8 years 10.5% / 20.10% 1. from 111
2014 7 years 11.1% / 21.80% 2. from 113
2013 6 years 5.8% / 10.80% 9. from 121
2012 5 years 6.0% / 10.30% 12. from 122
2011 4 years 2.3% / 5.50% 2. from 132
2010 3 years 1.9% / 5.10% 1. from 131
2009 2 years 2.2% / 5.00% 3. from 117
Porsche 911 2006
2018 12 years 12.2% / 26.89% 1. from 93
2017 11 years 10.4% / 27.10% 1. from 86
2016 10 years 11.7% / 24.90% 1. from 102
2015 9 years 11.5% / 26.80% 1. from 95
2014 8 years 11.1% / 21.80% 2. from 113
2013 7 years 6.2% / 17.20% 1. from 107
2012 6 years 6.0% / 10.30% 12. from 122
2011 5 years 4.6% / 10.40% 3. from 120
2010 4 years 1.9% / 5.10% 1. from 131
2009 3 years 2.2% / 5.00% 3. from 117
2008 2 years 2.6% / 4.80% 13. from 116
Porsche 911 2005
2017 12 years 10.4% / 27.10% 1. from 86
2016 11 years 13.9% / 31.40% 1. from 89
2015 10 years 11.5% / 26.80% 1. from 95
2014 9 years 10.3% / 28.80% 1. from 95
2013 8 years 6.2% / 17.20% 1. from 107
2012 7 years 5.5% / 17.50% 1. from 107
2011 6 years 4.6% / 10.40% 3. from 120
2010 5 years 4.7% / 9.90% 7. from 123
2009 4 years 2.2% / 5.00% 3. from 117
2008 3 years 2.6% / 4.80% 13. from 116
Porsche 911 2004
2016 12 years 13.9% / 31.40% 1. from 89
2015 11 years 14.6% / 32.10% 1. from 78
2014 10 years 10.3% / 28.80% 1. from 95
2013 9 years 8.8% / 23.00% 1. from 87
2012 8 years 5.5% / 17.50% 1. from 107
2011 7 years 5.5% / 16.70% 1. from 98
2010 6 years 4.7% / 9.90% 7. from 123
2009 5 years 3.6% / 9.30% 1. from 109
2008 4 years 2.6% / 4.80% 13. from 116
2006 2 years 3.5% / 6.60% 4. from 107
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