NHTSA safety investigation
NHTSA Investigation PE03029
Preliminary Evaluation · Subaru of America, Inc. · SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP
An investigation is not a finding that a defect exists.
NHTSA opens an investigation to examine whether a safety defect may exist. An open investigation is not a determination that a defect exists, and many investigations close without a recall. Investigations can, however, lead to one.
What NHTSA is examining
The agency's own description of the inquiry, quoted as published
BRAKING SYSTEM/ABS
SUBARU'S SUPPLEMENTAL RESPONSE OF SEPTEMBER 29, 2003, IDENTIFIED THAT THE 2002, 2003 SUBARU WRX MODELS AREEQUIPPED WITH THE BOSCH 5.3 ABS SYSTEM, AND IDENTIFIED THAT OTHER MODEL SUBARU VEHICLES ARE ALSO EQUIPPED WITH THE BOSCH 5.3 ABS SYSTEM, BUT HAVE DIFFERENT CALIBRATIONS THAN THE WRX MODEL VEHICLES.SUBARU IDENTIFIED THAT CHANGES WERE MADE IN THE ABS ECU TO ADDRESS A CALIBRATION LOGIC ISSUE WHEN DRIVING THE VEHICLE WITH THE SPARE TIRE MOUNTED.SUBARU REPORTED THAT BOTH THE ABS HYDRAULIC UNIT AND THE ABS ECU WERE MODIFIED, AND GAVE VIN NUMBERS TO IDENTIFY THE IMPLEMENTATION OF THE MODIFIED UNITS IN PRODUCTION. TESTING IS UNDERWAY TO GAIN AN UNDERSTANDING OF THE WRX VEHICLE PERFORMANCE DURING AN ABS ACTIVATION.FUTHER, ANALYSIS OFTHE DIFFERENCES IN VEHICLE PERFORMANCE RESULTING FROM ABS SOFTWARE CHANGES WILL BE EXAMINED.
An investigation is a separate record from a recall and from a manufacturer communication. A manufacturer campaign to repair a safety defect or a failure to meet a federal safety standard.
Investigation details
Identifiers, dates and outcome as recorded by NHTSA
- Action number
- PE03029
- Investigation type
- Preliminary Evaluation (PE)
- Status
- Closed
- Manufacturer
- Subaru of America, Inc.
- Component
- SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP
- Opened
- Jul 8, 2003
- Closed
- Nov 19, 2003
- Associated recall campaign
- None recorded
Vehicles named in this investigation
2 model years across 1 model
Being named here means NHTSA included the vehicle in the scope of its inquiry. It is not a statement that these vehicles have a defect.