2021 Lexus RC F BaseFACTORY OEM SERVICE PROCEDURE

Removal [09/2014 - ]: Procedure

  1. REMOVE V-BANK COVER SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 2 [09/2014 - 05/2018] , or refer to PROCEDURE - Step 2 [05/2018 - 03/2019] , or refer to PROCEDURE - Step 2 [03/2019 - ]

  2. REMOVE COOL AIR INTAKE DUCT SEAL 

    Refer to PROCEDURE - Step 1 [09/2014 - 11/2017] , or refer to PROCEDURE - Step 1 [11/2017 - 03/2019] , or refer to PROCEDURE - Step 1 [03/2019 - 01/2023] , or refer to PROCEDURE - Step 1 [01/2023 - ]

  3. REMOVE CENTER NO. 4 ENGINE UNDER COVER 

    Refer to PROCEDURE - Step 2 [09/2014 - 10/2015] , or refer to PROCEDURE - Step 2 [10/2015 - 11/2021] , or refer to PROCEDURE - Step 2 [11/2021 - ]

  4. DRAIN ENGINE COOLANT 

    Refer to PROCEDURE - Step 3

  5. DISCONNECT VENTILATION HOSE 
    1. Slide the 2 clips and disconnect the No. 2 ventilation hose and No. 3 ventilation hose from the air cleaner hose assembly.
      GTY501316Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 No. 2 Ventilation Hose
      *2 No. 3 Ventilation Hose
  6. REMOVE AIR CLEANER CAP WITH AIR CLEANER HOSE 
    1. Disconnect the mass air flow meter sub-assembly connector.
      GTY515718Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disengage the wire harness clamp.
    3. Disengage the 2 air cleaner cap clamps.
      GTY515717Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Loosen the hose clamp and remove the air cleaner cap with air cleaner hose from the throttle body with motor assembly.
  7. REMOVE THROTTLE BODY WITH MOTOR ASSEMBLY 
    1. Disconnect the throttle body with motor assembly connector.
      GTY515716Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Slide the clip and disconnect the No. 4 water by-pass hose from the front water by-pass joint.
      GTY496317Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 No. 4 Water By-pass Hose
      *2 No. 5 Water By-pass Hose
    3. Slide the clip and disconnect the No. 5 water by-pass hose from the water inlet housing.
    4. Remove the 2 bolts and 2 nuts from the throttle body with motor assembly.
      GTY515701Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Using an E6 "TORX" socket wrench, remove the 2 stud bolts, throttle body with motor assembly and throttle body gasket from the intake air surge tank assembly.
      GTY515702Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:

      If the throttle body with motor assembly has been struck or dropped, replace it.

    6. Slide the 2 clips and remove the No. 4 water by-pass hose and No. 5 water by-pass hose from the throttle body with motor assembly.
      GTY515703Courtesy 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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