Investigation PE03029: 2002–2003 Subaru WRX

Status

CLOSED

Opened

Jul 8, 2003

Closed

Nov 19, 2003

Model years

2002–2003

Subject

Braking system/abs

Component: Service brakes, hydraulic › Antilock/traction control/electronic limited slip

Summary

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 NHTSA investigation looks into whether a safety defect exists. Opening one is not a finding. Outcomes can include a recall, closure without action, or further inquiry.

Model years covered

• 2003 Subaru WRX60 complaints
• 2002 Subaru WRX427 complaints