9 problems have been reported for the 2001 Porsche 911. The following chart shows the 4 most common problems for 2001 Porsche 911. The number one most common problem is related to the vehicle's engine and engine cooling with 5 problems. The second most common problem is related to the vehicle's air bags (2 problems).
| Problem Category | Number of Problems |
|---|---|
| Engine And Engine Cooling | |
| Air Bag | |
| Equipment | |
| Exterior Lighting |
In our research we use the PPMY index to compare the reliability of vehicles. The PPMY index of a certain model is defined as the problems reported per thousand vehicles per Year. The total sales of the 2001 Porsche 911 in the United States are 11,045 units [1]. If the total number of problems reported by Porsche 911 owners in the last 21 years is 9, and the age of the vehicle is 21, the PPMY index can then be calculated as
PPMY Index = 9 / 11,045 / 21 * 1000 = 0.04.
For more information, refer to this page: A study of reliability comparison across Porsche 911 model year vehicles.
The following chart shows the number of problems reported during each of the service years since the debut of the 2001 Porsche 911 in 2001.
| Service Year | Number of Problems |
|---|---|
| 2022 | |
| 2021 | |
| 2020 | |
| 2019 | |
| 2018 | |
| 2017 | |
| 2016 | |
| 2015 | |
| 2014 | |
| 2013 | |
| 2012 | |
| 2011 | |
| 2010 | |
| 2009 | |
| 2008 | |
| 2007 | |
| 2006 | |
| 2005 | |
| 2004 | |
| 2003 | |
| 2002 | |
| 2001 |
When making the decision between buying a new or used Porsche 911, the following table can be used to compare the 2001 Porsche 911 with the Porsche 911 from other model years. Note that the number of problems reported for the 2001 911 is 9 while the average number of problems reported for the 21 model years of the Porsche 911 is 5.