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.

2002 Subaru Legacy GT Limited, AutomaticFACTORY OEM SERVICE PROCEDURE

Knock Sensor: Removal

Disconnect battery ground cable.

Fig 1: Disconnecting Battery Ground Cable
Courtesy of SUBARU OF AMERICA, INC.
Remove air cleaner case.

Fig 2: Removing Air Cleaner Case
Courtesy of SUBARU OF AMERICA, INC.
Disconnect knock sensor connector.

Fig 3: Disconnecting Knock Sensor Connector
Courtesy of SUBARU OF AMERICA, INC.
Remove knock sensor from cylinder block.

Fig 4: Removing Knock Sensor From Cylinder Block

Courtesy of SUBARU OF AMERICA, INC.

Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.