Two problems related to engine oil leaking have 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.
Toyota had a problem with there 4 cylinder engines in camry and Highlander with engine mountaing threads pulling away for a three or four year period. My car started leaking oil about 90,000 miles when I took in to a dealer he told me about the problem and Toyota did not issue a recall. I was told only fix is a new engine. They also had a problem with the catalytic converter also again no recall.
Engine oil sludge. The estimated cost of our engine problem was $7,200 (canadian) and it started at 38,000 km (24,000 miles). The matter was resolved when we dug up an old oil change slip that my wife and I had forgotten about altogether. Before the discovery we were unable to provide a receipt for each year that we have owned the car so Toyota insisted that it was customer negligence that resulted in the oil sludge. Top engine block was replaced and we got off scott free. When an oil leak was detected after a week of getting the car back from the shop, we brought it back in and they fixed it again - no charge. I feel that this was a bit like david knocking out goliath.