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.
2005 Toyota 4Runner SR5, 4.7 T, AWDFACTORY OEM SERVICE PROCEDURE
Knock Sensor (1GR-FE): Replacement
- REMOVE CYLINDER HEAD SUB-ASSY (SEE REPLACEMENT )
- DISCONNECT HEATER WATER INLET HOSE A
- REMOVE WATER OUTLET PIPE NO. 1
- Remove the 4 wire harness clamps.
- Remove the 3 bolts and the water outlet pipe.
- REMOVE KNOCK SENSOR
- Disconnect the 2 knock sensor connectors.
- Remove the 2 bolts and the 2 knock sensors.
- INSTALL KNOCK SENSOR
- Install the 2 knock sensors with the 2 bolts as shown in Fig 4
.
Torque: 20 N.m (204 kgf.cm, 15 ft.lbf)
- Connect the 2 knock sensor connectors.
- Install the 2 knock sensors with the 2 bolts as shown in Fig 4
.
- INSTALL WATER OUTLET PIPE NO. 1
Torque: 10 N.m (102 kgf.cm, 7 ft.lbf)
- CONNECT HEATER WATER INLET HOSE A
- INSTALL CYLINDER HEAD SUB-ASSY (SEE REPLACEMENT )
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.