111 problems have been reported for the 1999 Toyota Avalon. The following chart shows the 17 most common problems for 1999 Toyota Avalon. The number one most common problem is related to the vehicle's air bags with 25 problems. The second most common problem is related to the vehicle's vehicle speed control (21 problems).
The following chart shows the number of problems reported during each of the service years since the debut of the 1999 Toyota Avalon in 1999.
| Service Year | Number of Problems |
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| 1999 |
When making the decision between buying a new or used Toyota Avalon, the following table can be used to compare the 1999 Toyota Avalon with the Toyota Avalon from other model years. Note that the number of problems reported for the 1999 Avalon is 111 while the average number of problems reported for the 26 model years of the Toyota Avalon is 147.