One problem related to wiring has been reported for the 2009 Toyota Tacoma. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2009 Toyota Tacoma based on all problems reported for the 2009 Tacoma.
Both front marker light lenses are melting and the lamp socket is charred brown. The plastic lens is burnt brown and cracked. After driving for just a half hour, the plastic lens covering the marker light was soft and very hot. The hot marker lights were always on when driving, as as the directional turn signal lights. This a factory design defect. At what temperature will the plastic lens or socket wiring start an electrical fire? . . . Updated 11-06-13.