2007 Lexus RX 350 FWDFACTORY OEM SERVICE PROCEDURE

Knock Sensor: Removal

  1. DISCHARGE FUEL SYSTEM PRESSURE 

    (See REMOVAL )

  2. REMOVE V-BANK COVER SUB-ASSEMBLY  (See REMOVAL )
  3. DRAIN ENGINE COOLANT  (See ON-VEHICLE INSPECTION )
  4. REMOVE WINDSHIELD WIPER LINK ASSEMBLY 

    HINT:

    (See REMOVAL )

  5. REMOVE COWL TOP PANEL OUTER SUB-ASSEMBLY  (See REMOVAL  )
  6. REMOVE AIR CLEANER CAP SUB-ASSEMBLY  (See REMOVAL  )
  7. REMOVE AIR CLEANER CASE SUB-ASSEMBLY  (See REMOVAL  )
  8. REMOVE INTAKE AIR SURGE TANK ASSEMBLY 
    1. Disconnect the 2 water by-pass hoses from the throttle body.
    2. Disconnect the vapor feed hose.
    3. Disconnect the throttle body connector and clamp.
      Fig 1: Locating Intake Air Surge Tank Assembly Connector And Hoses
      G04974476Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Disconnect the ventilation hose No. 2.
    5. Disconnect the union to check valve hose.
      Fig 2: Locating Ventilation Hose No. 2
      G05268331Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Disconnect the connector.
      Fig 3: Locating Intake Air Surge Tank Assembly Connector
      G04974478Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    7. Using a 5 mm socket hexagon wrench, remove the 4 bolts.
    8. Remove the 2 nuts, 2 bolts and intake air surge tank.
    9. Remove the gasket from the intake air surge tank.
  9. REMOVE FUEL TUBE SUB-ASSEMBLY  (See REMOVAL )
  10. REMOVE INTAKE MANIFOLD  (See REMOVAL )
    Fig 4: Locating Intake Air Surge Tank Assembly Nuts And Bolts
    G05268333Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  11. REMOVE KNOCK CONTROL SENSOR 
    1. Disconnect the 2 knock sensor connectors.
    2. Remove the 2 bolts and then remove the 2 knock sensors.
      Fig 5: Locating Knock Control Sensor Connectors And Bolts
      G04973904Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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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.

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