One problem related to wiring has been reported for the 2013 Toyota Highlander. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2013 Toyota Highlander based on all problems reported for the 2013 Highlander.
The vehicle was parked in our driveway and has twice had rats chewing on the coolant temperature censor wiring. These are the only wires they've chewed on so far. I feel the soy based wiring that Toyota uses is to blame since my neighbors are not having problems with their vehicles that are parked outdoors. A claim with usaa has been filed.