One problem related to engine noise has been reported for the 2001 Toyota Highlander. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2001 Toyota Highlander based on all problems reported for the 2001 Highlander.
2. 4 (4cyl) engine making noise, sounds like rod knocking. Toyota dealer said same thing. Engine blew up at 45 mph. Oil was always changed at approximately 3000 miles. Used on highways and city streets. Contacted Toyota corporate and they didn't seem to care. Out of warranty. Never heard of a Toyota engine blowing a rod. This Highlander was in ex. Cond. To sold as junk never buy another Toyota again !!!!!!.