One problem related to engine belts and pulleys has been reported for the 1997 Toyota Avalon. The most recently reported issues are listed below.
After noticing oil spots on pavement had mechanic check vehicle. Found rack and pinion steering needed to be replaced/ driver's seat belt had to be replaced due to tensioner tightening up with too much force/ tires were wearing out prematurely due to bad suspension/vehicle had rough ride, and struts were leaking.