One problem related to steering idler arm has been reported for the 2002 Toyota Sienna. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2002 Toyota Sienna based on all problems reported for the 2002 Sienna.
Problems: 1: the starting idle will not keep car on if temperature is below 60 and I had to pay $200, just to have Toyota clean it, but they would not replace it. Even after it been cleaned the problem still happens randomly. 2: tire pressure gauge sensor has always been on even after its been reset two different times. 3: randomly the front wheels will vibrate then stop after about 15 miles. I've replaced with new tires and had brakes done twice but problems still persists.