One problem related to car stall 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.
Sudden rapid increase in engine temperature. Mechanic found leak at back of head gasket. Two bolts to engine block were loose enough to be removed by hand and new bolts could not be reinstalled due to defect in threads. Only repair said to be new engine. Vehicle was previously well maintained and had 73,000 miles.