Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2021 Subaru WRX BaseFACTORY OEM SERVICE PROCEDURE
Keyless Entry System
Check the keyless entry system operations as follows:
- Fully open all the door windows.
- Remove the key from ignition switch, and then close all doors.
- Press the "LOCK" button momentarily. Check that all the doors become locked, the buzzer sounds once, and the hazard lights flash once.
- Press the "UNLOCK" button momentarily. Check that the driver's door is unlocked, the buzzer sounds twice, and the hazard lights flash twice.
- Within 5 seconds, press the "UNLOCK" button momentarily. Check that all doors are unlocked, the buzzer sounds twice, and the hazard lights flash twice.
- Check that the buzzer sounds twice, and the hazard lights flash twice, when the trunk lid unlock button is held down to unlock the trunk lid.
- Press the "PANIC" button. Check that the panic mode (the horn keeps sounding, hazard light flashes) is initiated. Also, check that this condition continues for 30 seconds or until when any of the buttons on the key are pressed.
- Press the "LOCK" button momentarily with one of the doors opened. Check that the buzzer sounds 5 times, and the hazard light flashes 5 times to notify the door not being fully closed. Then, close all doors. Check if all doors are locked and buzzer sounds once and the hazard light flashes once.
- With one of the doors open, press the "LOCK" side of the power door lock switch. Then, close all doors. Check if all doors are locked and buzzer sounds once and the hazard light flashes once.
- Driver's side
- Passenger's side
Check keyless answer-back buzzer operation
- The system uses the buzzer and sounds the keyless answer-back buzzer when the door is locked or unlocked. The keyless answer-back buzzer can be turned OFF. To turn the keyless answer-back buzzer from ON to OFF, close all doors, (with the key not inserted into the key cylinder), hold down the "UNLOCK" side of the power door lock switch and insert the key into the key cylinder. Within 10 seconds, insert and take out the key for 5 times or more, and within 10 seconds after that, open and close the driver's door. With the door closed, the hazard light will flash 3 times, indicating that the keyless answer-back buzzer has been turned OFF. To turn the keyless answer-back buzzer from OFF to ON, perform this procedure again. The hazard light will flash 3 times, indicating that the keyless answer-back buzzer has been turned ON.
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.
