One problem related to gas recirculation valve (egr valve) 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.
Occasional throttle no response when trying to accelerate moderately from a stop, or from a very low speed (I. E. -coasting around a 90 degree turn with the engine at idle speed. ) I then push heavily on the accelerator pedal, and it revs up, downshifts, and races ahead. It is dangerous, in traffic. I have brought it to the dealer twice, and they cannot reproduce the problem. Two so called factory reps rode around with me the second time, with a computer connected. Diagnostics shows no error codes.