2007 Lexus RX 350 FWDFACTORY OEM SERVICE PROCEDURE

Knock Sensor: Installation

  1. INSTALL KNOCK CONTROL SENSOR 
    1. Install the 2 knock control sensors with the 2 bolts as shown in the illustration.

      Torque: 20 N*m (204 kgf*cm, 15 ft.*lbf) 

    2. Connect the 2 knock control sensor connectors.
  2. INSTALL INTAKE MANIFOLD  (See INSTALLATION )
  3. CONNECT FUEL PIPE SUB-ASSEMBLY  (See INSTALLATION )
  4. INSTALL INTAKE AIR SURGE TANK 
    NOTE: DO NOT apply oil to the bolts listed below.
    TORQUE SPECIFICATION

    Tightening Parts Torque N*m (kgf cm, ft.*lbf) QTY
    Surge Tank and Intake Manifold 18 (184,13) 4
    No. 1 Surge Tank Stay and Surge Tank 21 (214, 15) 1
    Throttle Body Bracket and Surge Tank 21 (214, 15) 1
    Fig 1: Locating Knock Control Sensor Connectors And Bolts
    G04973906Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Install a new gasket to the intake air surge tank.
    2. Using a 5 mm hexagon socket wrench, install the 4 bolts.

      Torque: 18 N*m (184 kgf*cm, 13 ft.*lbf) 

    3. Install the intake air surge tank with the 2 nuts and 2 bolts.

      Torque: Nut 

      16 N*m (163 kgf*cm, 12 ft.*lbf) 

      Bolt 

      21 N*m (214 kgf*cm, 15 ft.*lbf) 

      Fig 2: Locating Intake Air Surge Tank Nuts And Bolts
      G04975023Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Connect the connector.
      Fig 3: Locating Intake Air Surge Tank Assembly Connector
      G04974478Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Connect the union to check valve hose.
    6. Connect the ventilation hose No. 2.
      Fig 4: Locating Ventilation Hose No. 2
      G05268339Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    7. Install the clamp and connect the throttle with motor body assembly connector.
    8. Connect the vapor feed hose.
    9. Connect the 2 water by-pass hoses to the throttle with motor body assembly.
  5. INSTALL AIR CLEANER CASE SUB-ASSEMBLY  (See INSTALLATION )
  6. INSTALL AIR CLEANER CAP SUB-ASSEMBLY  (See INSTALLATION  )
  7. ADD ENGINE COOLANT  (See ON-VEHICLE INSPECTION )
    Fig 5: Locating Throttle With Motor Body Assembly Hoses And Clamps
    G04974522Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  8. CHECK FOR ENGINE COOLANT LEAKS  (See ON-VEHICLE INSPECTION )
  9. CHECK FOR FUEL LEAKS  (See INSTALLATION )
  10. INSTALL COWL TOP OUTER PANEL SUB-ASSEMBLY  (See INSTALLATION  )
  11. INSTALL WINDSHIELD WIPER LINK ASSEMBLY 

    HINT:

    (See INSTALLATION )

  12. INSTALL V-BANK COVER SUB-ASSEMBLY  (See INSTALLATION )
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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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