2005 Lexus RX 330 AWDFACTORY OEM SERVICE PROCEDURE

Throttle Body ASSY (3MZ-FE): Replacement

  1. DRAIN ENGINE COOLANT (See  ENGINE COOLANT (3MZ-FE)  ) 
  2. REMOVE V-BANK COVER SUB-ASSY 
    1. Using a socket hexagon wrench 5, remove the 3 nuts.
    2. Remove the V-bank cover.
    Fig 1: Removing V-Bank Cover Sub-Assy
    G03010606Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. REMOVE AIR CLEANER INLET NO. 2 (See  REPLACEMENT  ) 
  4. REMOVE AIR CLEANER ASSY (See  REPLACEMENT  ) 
  5. REMOVE INTAKE AIR RESONATOR 
    1. Remove the ventilation hose No. 2.
    2. Remove the fuel vapor feed hose from the 2 hose clamps.
    3. Loosen the air cleaner hose clamp bolt, and then remove the intake air resonator.
      Fig 2: Removing Intake Air Resonator
      G03010607Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. REMOVE THROTTLE BODY ASSY 
    1. Disconnect the throttle motor connector.
      Fig 3: Disconnecting Throttle Motor Connector
      G03010608Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the water by-pass hose No. 2.
    3. Disconnect the water by-pass hose No. 3.
    4. TMC Made
      1. Remove the 4 bolts, and then remove the throttle body.
        Fig 4: Removing Throttle Body (TMC Made)
        G03010609Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. TMMWV Made
      1. Remove the 2 bolts and 2 nuts, and then remove the throttle body.
        2. Fig 5: Removing Throttle Body (TMMWV Made)
        G03010610Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Remove the gasket from the intake air connector.
  7. INSTALL THROTTLE BODY ASSY 
    1. Install a new gasket to the intake air connector.
    2. TMC Made
      1. Install the throttle body with the 4 bolts.

        Torque: 11 N.m (112 kgf.cm, 8 ft.lbf) 

    3. TMMWV Made
      1. Install the throttle body with the 2 bolts and 2 nuts.

        Torque: 11 N.m (112 kgf.cm, 8 ft.lbf) 

    4. Connect the water by-pass hose No. 3.
    5. Connect the water by-pass hose No. 2.
    6. Connect the throttle motor connector.
  8. INSTALL INTAKE AIR RESONATOR 
  9. INSTALL AIR CLEANER ASSY (See  REPLACEMENT  ) 
  10. INSTALL AIR CLEANER INLET NO. 2 (See  REPLACEMENT  ) 
  11. CHECK CONNECTION OF VACUUM HOSE (See step 178 in  REPLACEMENT  ) 
  12. ADD ENGINE COOLANT (See  ENGINE COOLANT (3MZ-FE)  ) 
  13. CHECK FOR ENGINE COOLANT LEAKS (See  COOLING SYSTEM (3MZ-FE)  ) 
  14. INSTALL V-BANK COVER SUB-ASSY 
    1. Fit the 2 retainers and install the V-bank cover.
    2. Using a socket hexagon wrench 5, tighten the 3 nuts.

      Torque: 7.9 N.m (81 kgf.cm, 70 in.lbf) 

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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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