Audi A4 - Problems, Statistics, and Analysis

Audi A4 owners have reported a total of 3,683 problems for their cars built in the 29 model years listed in the chart below. The chart shows the number of problems reported across all service years for each given model year of the Audi A4. The 2006 Audi A4 cars have the most problems reported (342 problems).

🔍 Common problems of Audi A4

The following chart shows the 28 most common problems for Audi A4 cars. The number one most common problem is related to the vehicle's air bags (605 problems). The second most common problem is related to the vehicle's engine and engine cooling (534 problems).

📉 Compare Reliability Across Model Years Using PPMY Index

It would not be fair to compare the Audi A4 of an older model year to newer model years since older vehicles have been in service longer and thus are expected to have more problems. In order to compare the reliability across A4 model years, we use the PPMY index which is defined as the problems reported per thousand vehicles per Year. A smaller PPMY index indicates greater reliability of the given model year cars.

    PPMY = P / S / Y * 1000,

where P = total problems reported during the life of a Audi A4 model year; S = total units sold of the model year; Y = years since the debut of the model year (the age of the vehicle).

The results are shown in Table 3.

📊 Number of Problems Reported During the First Year

Another way to measure the reliability across the model years of the Audi A4 is to use the total number of problems reported during the vehicle's first year in service, as shown in the Table 4.

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☘ A4 Service Bulletins

⚑ A4 Safety Recalls

☤ A4 Defect Investigations