One problem related to engine exhaust system has been reported for the 2001 Toyota Avalon. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2001 Toyota Avalon based on all problems reported for the 2001 Avalon.
Engine sludge is creating excessive smoking and the car uses 2 quarts of oil every 2 fillups. The vehicle started smoking in July of 2009 at 120,000 miles and was still under an 8 year warranty on the engine. Took the vehicle to the dealership in redding and they refused to honor the 8 year warranty because I was unable to provide enough receipts that I had changed the oil on a regular basis. They say the engine is ruined.