Fixated on Floor Mats

Last month, NHTSA kicked a two-year-old investigation into unintended acceleration in Ford Fusion and Mercury Milan vehicles up to an Engineering Analysis. The suspected defect – floor mats that can entrap the accelerator pedal. According to the National Highway Traffic Safety Administration’s Office of Defects Analysis:

“A heel blocker in the floor pan provides a platform that may lift an unsecured mat into contact with the pedal. Ford introduced new pedals as a running change early in model year (MY) 2010 vehicles. Analysis of complaints received by ODI and Ford show elevated rates of pedal entrapment incidents in MY 2008 through early 2010 production vehicles. Incidents typically occur following hard pedal applications to pass slower traffic or when merging into faster traffic. Drivers allege continued high engine power after releasing the accelerator pedal and difficulty braking, including reports that the incident was controlled by shifting to neutral or turning the engine off. Drivers and service technicians reference observing evidence of mat interference or note unsecured Ford or aftermarket all weather floor mats in post-incident inspections.”

This action was followed by a high-profile $17.4 million civil penalty that the agency levied against Toyota for failing to launch a timely recall for floor mat interference involving Lexus RX350 and RX450h vehicles. This was a NHTSA-influenced recall of mysterious origins since the Vehicle Owner’s Questionnaire complaints didn’t seem to support a floor mat interference defect trend (see A Defect Remedy Delayed) – although the Lexus RX has certainly been plagued with all manner of sudden acceleration complaints.

These two events sent us digging through the recall and investigation archives to get a better handle on the greater context. There seems to have been an awful lot of floor mat-related brouhahas in the last few years. It seemed odd that floor mats – which exist solely to provide a barrier between muddy shoes and the carpeted floor pan – should suddenly be so troublesome. In the old days, rubber floor mats were rarely secured with retention clips, as they are now. In one of its responses to the 2010 Ford Fusion Preliminary Evaluation, the automaker reminded NHTSA:

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