One problem related to oil pump has been reported for the 2003 Toyota Highlander. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Toyota Highlander based on all problems reported for the 2003 Highlander.
The SUV was out of coolant & water and my husband take the car to the dealer to check this problem and for regular maintenance (the car only has received service at the dealer, except for tires). The diagnostic was that the shock block has it threads separated from the screws (or bolts). The engine has to be removed in order to change the shock block. The repair has cost $4701. 31, because it was also recommended to change the oil pump. Previous to this repair, the SUV was taken to the dealer because there was a recall to reprogram its computer because the check engine light turned on (this happened twice). We have a full record in the dealer of all maintenance checks and repairs the SUV had.