The U.S. National Highway Traffic Safety Administration is investigating consumer complaints of  driver’s side door fires in 2007 Toyota Camry  sedans and RAV4 crossovers.

"Based on the available information, it appears the fires are originating from the power window master switch located on the driver's side door," the filing reports.

Six consumers have complained, according to the investigation NHTSA began this weekl. This probe is not officially a recall, but may lead to one in which an estimated 830,000 cars and SUVs may be affected.

Toyota’s safety team is cooperating with the investigation, but will not comment until more information from NHTSA is revealed.