Chevrolet Impala - Problems, Statistics, and Analysis

Chevrolet Impala owners have reported a total of 13,824 problems for their cars built in the 25 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 Chevrolet Impala. The 2009 Chevrolet Impala cars have the most problems reported (1,321 problems).

🔍 Common problems of Chevrolet Impala

The following chart shows the 32 most common problems for Chevrolet Impala cars. The number one most common problem is related to the vehicle's electrical system (3,318 problems). The second most common problem is related to the vehicle's engine and engine cooling (1,796 problems).

📉 Compare Reliability Across Model Years Using PPMY Index

It would not be fair to compare the Chevrolet Impala 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 Impala 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 Chevrolet Impala 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 Chevrolet Impala 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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☘ Impala Service Bulletins

⚑ Impala Safety Recalls

☤ Impala Defect Investigations

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