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 MANUALSTOYOTA20094RUNNER LIMITED, 4.0 U, RWDREPAIR AND DIAGNOSISENGINE PERFORMANCEENGINE CONTROL SYSTEM (1GR-FE)KNOCK SENSORREMOVAL

2009 Toyota 4Runner Limited, 4.0 U, RWD

Knock Sensor: Removal

2009 Toyota 4Runner Limited, 4.0 U, RWDSECTION Removal

REMOVE CYLINDER HEAD SUB-ASSEMBLY (See REMOVAL )
DISCONNECT HEATER WATER INLET HOSE A
1. Disconnect the heater water inlet hose A.
  
  Fig 1: Identifying Heater Water Inlet Hose A
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
REMOVE WATER OUTLET PIPE NO.1
1. Remove the 4 wire harness clamps [A].
2. Remove the 3 bolts [B] and the water outlet pipe.
  
  Fig 2: Locating Wire Harness Clamps & Water Outlet Pipe Bolts
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
REMOVE KNOCK SENSOR
1. Disconnect the 2 knock sensor connectors.
2. Remove the 2 bolts and the 2 knock sensors.
  
  Fig 3: Identifying Knock Sensor Connectors & Knock Sensors With Bolts
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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.