How to Replace Wiper Transmission 04-09 Subaru Outback

Difficulty: Advanced · About 120 min · Subaru Outback

Replace the windshield wiper transmission on a 2004–2009 Subaru Outback by marking the arm positions, transferring the indexed motor, and verifying sweep and park operation.

Steps

1. Mark and remove the wiper arms

   Mark each blade's parked position on the windshield. Remove the arm covers and 14mm nuts, then lift both arms off their shafts.

2. Remove the cowl

   Release the cowl clips and side brackets, then lift the cowl from beneath the hood. Keep the weatherstrip and retainers for reuse.

3. Remove the transmission

   With the ignition off and key removed, unplug the wiper motor and release its harness retainer. Remove the four mounting bolts and lift the transmission from the frame.

4. Transfer and index the motor

   Mark the motor's alignment with the transmission arm if reusing it. Hold the linkage while removing the motor shaft nut, then transfer the motor to the replacement transmission using the indexing marks.

5. Install the transmission and cowl

   Position the assembly on the frame, install its four bolts, and reconnect the motor plug and harness retainer. Refit the cowl brackets, clips, and weatherstrip.

6. Reinstall and test the wiper arms

   Align both arms with the windshield marks and install their nuts, tightening to the vehicle's specification. Test all wiper settings and confirm the blades sweep and park correctly.

Check your vehicle’s repair manual for exact specifications and fit.