1999 Porsche 911 - Problems, Statistics, and Analysis

🔎 Common problems of the 1999 Porsche 911

12 problems have been reported for the 1999 Porsche 911. The following chart shows the 7 most common problems for 1999 Porsche 911. The number one most common problem is related to the vehicle's engine and engine cooling with 3 problems. The second most common problem is related to the vehicle's seat belts (3 problems).

📈 PPMY Index and Problem Occurrence Trend

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 1999 Porsche 911 in the United States are 12,985 units [1]. If the total number of problems reported by Porsche 911 owners in the last 23 years is 12, and the age of the vehicle is 23, the PPMY index can then be calculated as

      PPMY Index = 12 / 12,985 / 23 * 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 1999 Porsche 911 in 1999.

📊 Compare the 1999 Porsche 911 with Other Model Years

When making the decision between buying a new or used Porsche 911, the following table can be used to compare the 1999 Porsche 911 with the Porsche 911 from other model years. Note that the number of problems reported for the 1999 911 is 12 while the average number of problems reported for the 21 model years of the Porsche 911 is 5.

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✿ Fuel Economy of 911 Vehicles

☘ 911 Service Bulletins

⚑ 911 Safety Recalls

☤ 911 Defect Investigations