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.

2016 Subaru WRX BaseFACTORY OEM SERVICE PROCEDURE

LH Side

Install the knock sensor to the cylinder block.
NOTE: The knock sensor should be installed so that the center of the connector is positioned at a 47.5 - 62.5° angle relative to the rear of engine.

Tightening torque:

24 N.m (2.4 kgf-m, 17.7 ft-lb)

Fig 1: Identifying Knock Sensor Connector Tightening Angle (LH Side)
Courtesy of SUBARU OF AMERICA, INC.
Connect the connector to the knock sensor.

Fig 2: Locating Knock Sensor Connector (LH Side)
Courtesy of SUBARU OF AMERICA, INC.
Install the bolts securing the engine harness.
Tightening torque:

19 N.m (1.9 kgf-m, 14.0 ft-lb)

Fig 3: Locating Engine Harness Bolt
Courtesy of SUBARU OF AMERICA, INC.
Install the throttle body. < Ref. to INSTALLATION , Throttle Body. >
Install the intercooler. < Ref. to INSTALLATION , Intercooler. >
Connect the ground terminal to battery sensor. < Ref. to BATTERY , NOTE, Note. >
Install the collector cover. < Ref. to INSTALLATION , Collector Covers

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.