Last month, Toyota and the National Highway Traffic Safety Administration issued a safety advisory alerting the owners of 3.8 million Toyota and Lexus vehicles to remove the driver's side floor mats in their cars. The mats, Toyota said, could slide forward and interfere with the gas pedal, whose design allowed it to be easily jammed, causing a dangerous Unintended Acceleration situation. The recall is the largest ever for Toyota and the fifth largest recall of a consumer product in the United States.