One problem related to defogger has been reported for the 2002 Toyota Avalon. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2002 Toyota Avalon based on all problems reported for the 2002 Avalon.
Driving my 2002 Avalon xls in a hard rain and in pooled street water, the wash from other cars caused my aircondition belt to get wet and the defogging system to go off immediately, result in a complete lack of visibility. The service managerat the dealers said this was a usual occurence and not a part failure, but an engineering defect, and not correctible.