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.
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HOMESERVICE MANUALSSUBARU2012IMPREZA WRX STI F4-2.5L DOHC TURBOREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMCAMSHAFT POSITION SENSORSERVICE AND REPAIR
2012 Subaru Impreza WRX STI F4-2.5L DOHC Turbo
Camshaft Position Sensor: Service and Repair
2012 Subaru Impreza WRX STI F4-2.5L DOHC TurboSECTION Service and Repair
Camshaft Position Sensor
REMOVAL
INTAKE SIDE
- Camshaft position sensor RH
1. Disconnect the ground cable from battery.
2. Disconnect the connector (A) from the camshaft position sensor RH, and remove the camshaft position sensor RH from the rear side of the cylinder head.
- Camshaft position sensor LH
1. Disconnect the ground cable from battery.
2. Remove the intake manifold.
3. Remove the camshaft position sensor LH.
EXHAUST SIDE
1. Disconnect the ground cable from battery.
2. Lift up the vehicle.
3. Remove the under cover.
4. Remove the engine harness cover. (right side only.)
5. Disconnect connector (A) from the camshaft position sensor, and remove the camshaft position sensor from under the cylinder head.
- RH side
- LH side
INSTALLATION
INTAKE SIDE
Install in the reverse order of removal.
Tightening torque: 6.4 N.m (0.7 kgf-m, 4.7 ft-lb)
EXHAUST SIDE
Install in the reverse order of removal.
Tightening torque: 6.4 N.m (0.7 kgf-m, 4.7 ft-lb)
- RH side
- LH side
Tightening torque: 5 N.m (0.5 kgf-m, 3.7 ft-lb)
REMOVAL
INTAKE SIDE
- Camshaft position sensor RH
1. Disconnect the ground cable from battery.
2. Disconnect the connector (A) from the camshaft position sensor RH, and remove the camshaft position sensor RH from the rear side of the cylinder head.
- Camshaft position sensor LH
1. Disconnect the ground cable from battery.
2. Remove the intake manifold.
3. Remove the camshaft position sensor LH.
EXHAUST SIDE
1. Disconnect the ground cable from battery.
2. Lift up the vehicle.
3. Remove the under cover.
4. Remove the engine harness cover. (right side only.)
5. Disconnect connector (A) from the camshaft position sensor, and remove the camshaft position sensor from under the cylinder head.
- RH side
- LH side
INSTALLATION
INTAKE SIDE
Install in the reverse order of removal.
Tightening torque: 6.4 N.m (0.7 kgf-m, 4.7 ft-lb)
EXHAUST SIDE
Install in the reverse order of removal.
Tightening torque: 6.4 N.m (0.7 kgf-m, 4.7 ft-lb)
- RH side
- LH side
Tightening torque: 5 N.m (0.5 kgf-m, 3.7 ft-lb)
RENDER: 1.0x
NO RELATED
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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.