One problem related to transmission gear slipping has been reported for the 2005 Toyota Highlander. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2005 Toyota Highlander based on all problems reported for the 2005 Highlander.
I have a 2005 Toyota Highlander and the transmission has slipped from about 45,000 miles when it shift from 3rd to 4th. Taken it to dealer for upgrade on ecm and this did not fix problem and it is getting worse.