One problem related to ignition module has been reported for the 2002 Toyota Prius. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2002 Toyota Prius based on all problems reported for the 2002 Prius.
2002 new Toyota Prius delivered with bridgestone potenza tires. These tires have failed after 12,000 miles. Then changed tires (all 4) which failed at 10,000 miles. Toyota corporate says its not their concern. Dealer told me they are not safe tires. I have replaced tires every 10,000 miles. Toyota corporate recommends these tires and takes no responsibility for them.