Toyota Motor Corp.
's global recall of 7.43 million vehicles to fix power-window switches traces back to a 2008 complaint in the United States and pins blame on an American supplier and its Japanese parent.
According to Toyota documents filed this week with the National Highway Traffic Safety Administration, the first field report indicating a problem was received by Toyota in September 2008. It cited an unusual smell coming from the power-window switch as well as heat damage.
The part was returned to the supplier for examination, but no root cause could be determined, Toyota said in an Oct. 10 filing with NHTSA.