Vehicle report

2007 LEXUS ES350

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Defect investigations

2 actions

DP09001 · DP

VEHICLE SPEED CONTROL Investigation

THE OFFICE OF DEFECTS INVESTIGATION (ODI) OPENED DP09-001 ON APRIL 8, 2009, TO EVALUATE A DEFECT PETITION REQUESTING ADDITIONAL INVESTIGATION OF POTENTIAL THROTTLE CONTROL SYSTEM DEFECTS UNRELATED TO FLOOR MAT INTERFERENCE WITH ACCELERATOR PEDALS IN MODEL YEAR (MY) 2007 LEXUS ES 350 VEHICLES.THE PETITIONER REFERENCED AN EARLIER ODI INVESTIGATION CONCERNING FLOOR MAT INTERFERENCE WITH ACCELERATOR PEDAL RETURN (PE07-016/EA07-010), WHICH HE STATED WAS TOO NARROW IN SCOPE AS IT DID NOT INCLUDE ALL INCIDENTS OF UNWANTED ACCELERATION AND CONSIDER ALL POTENTIAL CAUSES OF VEHICLE SPEED CONTROL CONCERNS.THE PETITION ALSO REQUESTED AN INVESTIGATION OF MY 2002-2003 LEXUS ES300 FOR THOSE 'LONGER DURATION INCIDENTS INVOLVING UNCONTROLLABLE ACCELERATION WHERE BRAKE PEDAL APPLICATION ALLEGEDLY HAD NO EFFECT' THAT WERE DETERMINED NOT TO BE WITHIN THE SCOPE OF INVESTIGATION PE04-021. AS BACKGROUND, THE PETITIONER OWNS A MY 2007 LEXUS ES350 THAT ALLEGEDLY EXPERIENCED AN UNWANTED AND UNCONTROLLED ACCELERATION EVENT (ODI COMPLAINT NUMBER 10261660).TOYOTA CONCLUDED THAT THE INCIDENT WAS CAUSED BY AN UNSECURED FLOOR MAT. TO ASSESS THE PETITIONER'S REQUEST, ODI INTERVIEWED THE PETITIONER, INSPECTED HIS VEHICLE, REVIEWED INFORMATION SUBMITTED BY TOYOTA, REVIEWED OWNER COMPLAINTS ALLEGING INCIDENTS OF UNWANTED ACCELERATION IN THE SUBJECT VEHICLES AND MATERIAL RELATED TO THE INVESTIGATIONS CITED BY THE PETITIONER.ODI IDENTIFIED 64 COMPLAINTS ALLEGING INCIDENTS OF UNWANTED ACCELERATION IN MY 2007 LEXUS VEHICLES, RESULTING IN 8 CRASHES AND 15 INJURIES.ODI'S ANALYSIS OF THESE COMPLAINTS DETERMINED THAT 50 (78%) INVOLVED INCIDENTS OF FLOOR MAT INTERFERENCE, INCLUDING 7 (88%) OF THE CRASHES AND ALL 15 INJURIES.THEREFORE, ODI'S ANALYSIS FOUND THAT THE ONLY DEFECT TREND RELATED TO VEHICLE SPEED CONTROL IN THE SUBJECT VEHICLES INVOLVED THE POTENTIAL FOR ACCELERATOR PEDALS TO BECOME TRAPPED NEAR THE FLOOR BY OUT-OF-POSITION OR INAPPROPRIATE FLOOR MAT INSTALLATIONS. ON OCTOBER 5, 2009, TOYOTA INITIATED A SAFETY RECALL (RECALL 09V-388) TO ADDRESS CONCERNS WITH POTENTIAL ACCELERATOR PEDAL ENTRAPMENT BY FLOOR MATS IN APPROXIMATELY 3.8 MILLION VEHICLES, INCLUDING THE SUBJECT VEHICLES.EXCEPT INSOFAR AS THE PETITIONER'S CONTENTIONS RELATE TO THAT RECALL, THE FACTUAL BASES OF THE PETITIONER'S CONTENTIONS THAT ANY FURTHER INVESTIGATION IS NECESSARY ARE UNSUPPORTED. IN OUR VIEW, ADDITIONAL INVESTIGATION IS UNLIKELY TO RESULT IN A FINDING THAT A DEFECT RELATED TO MOTOR VEHICLE SAFETY EXISTS OR A NHTSA ORDER FOR THE NOTIFICATION AND REMEDY OF A SAFETY-RELATED DEFECT, AS ALLEGED BY THE PETITIONER, AT THE CONCLUSION OF THE REQUESTED INVESTIGATION.THEREFORE, IN VIEW OF THE NEED TO ALLOCATE AND PRIORITIZE NHTSA'S LIMITED RESOURCES TO BEST ACCOMPLISH THE AGENCY'S SAFETY MISSION, THE PETITION IS DENIED.THIS ACTION DOES NOT CONSTITUTE A FINDING BY NHTSA THAT A SAFETY-RELATED DEFECT DOES NOT EXIST.THE AGENCY WILL TAKE FURTHER ACTION IF WARRANTED BY FUTURE CIRCUMSTANCES.PLEASE SEE THEFEDERAL REGISTER NOTICE FOR FURTHER DETAILS.

PE07016 · PE

VEHICLE SPEED CONTROL:ACCELERATOR PEDAL Investigation

COMPLAINANTS INTERVIEWED BY ODI STATED THAT THEY APPLIED THE THROTTLE PEDAL TO ACCELERATE THE VEHICLE THEN EXPERIENCED UNWANTED ACCELERATION AFTER RELEASE.SUBSEQUENT (AND SOMETIMES REPEATED) APPLICATIONS OF THE BRAKE PEDAL REDUCED ACCELERATION BUT DID NOT STOP THE VEHICLE.IN SOME INCIDENTS DRIVERS TRAVELED SIGNIFICANT DISTANCES (MILES) AT HIGH VEHICLE SPEEDS (GREATER THAN 90 MPH) BEFORE THE VEHICLE STOPPED (ODI NOTES THAT MULTIPLE BRAKE APPLICATIONS WITH THE THROTTLE IN AN OPEN POSITION CAN DEPLETE THE BRAKE SYSTEM'S POWER (VACUUM) ASSIST RESERVE RESULTING IN DIMINISHED BRAKING).THE SUBJECT VEHICLES HAVE AN ENGINE CONTROL BUTTON INSTEAD OF A TRADITIONAL IGNITION KEY. SOME DRIVERS REPORTED THAT THEIR ATTEMPTS TO TURN THE ENGINE OFF BY PRESSING THE CONTROL BUTTON WERE UNSUCCESSFUL.IN THESE CASES IT APPEARS THE DRIVERS WERE UNAWARE THAT THE BUTTON'S FUNCTIONALITY CHANGES WHEN THE VEHICLE IS IN MOTION REQUIRING THAT IT BE DEPRESSED FOR 3 SECONDS (INSTEAD OF MOMENTARILY) TO STOP THE ENGINE.ODI HAS OBSERVED THAT AN UNSECURED LEXUS ACCESSORY ALL WEATHER FLOOR MAT CAN TRAP THE THROTTLE PEDAL IN AN OPEN POSITION RESULTING IN SIGNIFICANT UNWANTED ACCELERATION.UNSECURED FLOOR MATS HAVE BEEN FOUND IN THE MAJORITY OF INCIDENT VEHICLES.IN ADDITION, ODI HAS INSPECTED TWO INCIDENT VEHICLES DOCUMENTING BRAKE DAMAGE DUE TO OVERHEATING. IN THE FIVE ODI CRASH INCIDENTS THE OPERATORS ALLEGE THEY EXPERIENCED UNWANTED ACCELERATION AND WERE UNABLE TO STOP THE VEHICLE TO AVOID THE COLLISION.FOUR OF THE FIVE CRASHES ARE MULTI-VEHICLE (ONE INVOLVING 7 VEHICLES) AND TWO RESULTED IN TOTAL LOSS DAMAGES (ONE INVOLVING A FIRE).ONE INJURY, WHICH RESULTED FROM A ROLL-OVER CRASH, WAS SIGNIFICANT AND THE INJURED PERSON CONTINUES TO SHOW SYMPTOMS.ONE INJURY INCIDENT IS NOT CRASH RELATED (COMPLAINANT ALLEGES A KNEE INJURY DUE TO OVEREXERTION DURING BRAKE APPLICATION). IN THEIR RESPONSE TO ODI'S APRIL 5, 2007 INFORMATION REQUEST LETTER, TOYOTA ACKNOWLEDGES THAT SOME OF THE ALLEGED INCIDENTS ARE LIKELY RELATED TO IMPROPER INSTALLATION OF THE DRIVER SIDE ALL WEATHER FLOOR MAT RESULTING IN INTERFERENCE WITH ACCELERATOR PEDAL MOVEMENT.TOYOTA DESCRIBES VARIOUS CHANGES TO THE LABELING OF THE ALL WEATHER MAT (INCLUDING A STICKER FOR THE BOTTOM OF THE MAT AND ENLARGING THE STATEMENT ON THE VISIBLE SURFACE) AND THE PACKAGING USED FOR SALES OF THE MATS, AND HAS NOTIFIED ODI OF AN OWNER MAILING TO SUBJECT VEHICLE OWNERS WARNING OF THE DANGERS OF IMPROPER MAT INSTALLATION.TOYOTA BELIEVES THE SUBJECT VEHICLES AND THE ALL WEATHER MAT DO NOT CONTAIN A SAFETY RELATED DEFECT AND THAT THE ACTIONS THEY HAVE TAKEN ARE SUFFICIENT TO ADDRESS ANY FUTURE CONCERNS. THIS INVESTIGATION HAS BEEN UPGRADED TO AN ENGINEERING ANALYSIS TO FURTHER INVESTIGATE THIS ISSUE AND TO ASSESS THE ACTIONS TAKEN BY TOYOTA.

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Complaint counts are reports filed with NHTSA, not failure rates. A common model collects more of them than a rare one that breaks more often.