2021 Lexus LS 500 Base, AWDFACTORY OEM SERVICE PROCEDURE

Removal [12/2017 - ]: Procedure

  1. REMOVE V-BANK COVER SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 11 [12/2017 - 09/2018] , or refer to PROCEDURE - Step 11 [09/2018 - 10/2020] , or refer to PROCEDURE - Step 11 [10/2020 - 10/2022] , or refer to PROCEDURE - Step 11 [10/2022 - 10/2023] , or refer to PROCEDURE - Step 11 [10/2023 - ]

  2. REMOVE RADIATOR COVER PLATE 

    Refer to PROCEDURE - Step 9 [12/2017 - 09/2018] , or refer to PROCEDURE - Step 9 [09/2018 - 10/2020] , or refer to PROCEDURE - Step 9 [10/2020 - 10/2022] , or refer to PROCEDURE - Step 9 [10/2022 - 10/2023] , or refer to PROCEDURE - Step 9 [10/2023 - ]

  3. REMOVE UPPER RADIATOR SUPPORT SEAL 

    Refer to PROCEDURE - Step 8 [12/2017 - 09/2018] , or refer to PROCEDURE - Step 8 [09/2018 - 10/2020] , or refer to PROCEDURE - Step 8 [10/2020 - 10/2022] , or refer to PROCEDURE - Step 8 [10/2022 - 10/2023] , or refer to PROCEDURE - Step 8 [10/2023 - ]

  4. REMOVE LOWER RADIATOR AIR DEFLECTOR 

    Refer to PROCEDURE - Step 10 [12/2017 - 09/2018] , or refer to PROCEDURE - Step 10 [09/2018 - 10/2020] , or refer to PROCEDURE - Step 10 [10/2020 - 10/2022] , or refer to PROCEDURE - Step 10 [10/2022 - 10/2023] , or refer to PROCEDURE - Step 10 [10/2023 - ]

  5. REMOVE RADIATOR SUPPORT TO CROSSMEMBER BRACE SUB-ASSEMBLY RH 

    Refer to PROCEDURE - Step 40 [12/2017 - 09/2018] , or refer to PROCEDURE - Step 40 [09/2018 - 10/2020] , or refer to PROCEDURE - Step 40 [10/2020 - 10/2022] , or refer to PROCEDURE - Step 40 [10/2022 - 10/2023] , or refer to PROCEDURE - Step 40 [10/2023 - ]

  6. REMOVE RADIATOR SUPPORT TO CROSSMEMBER BRACE SUB-ASSEMBLY LH 

    Refer to PROCEDURE - Step 39 [12/2017 - 09/2018] , or refer to PROCEDURE - Step 39 [09/2018 - 10/2020] , or refer to PROCEDURE - Step 39 [10/2020 - 10/2022] , or refer to PROCEDURE - Step 39 [10/2022 - 10/2023] , or refer to PROCEDURE - Step 39 [10/2023 - ]

  7. REMOVE AIR CLEANER ASSEMBLY RH 

    Refer to PROCEDURE - Step 44 [12/2017 - 09/2018] , or refer to PROCEDURE - Step 44 [09/2018 - 10/2020] , or refer to PROCEDURE - Step 44 [10/2020 - 10/2022] , or refer to PROCEDURE - Step 44 [10/2022 - 10/2023] , or refer to PROCEDURE - Step 44 [10/2023 - ]

  8. REMOVE AIR CLEANER ASSEMBLY LH 

    Refer to PROCEDURE - Step 43 [12/2017 - 09/2018] , or refer to PROCEDURE - Step 43 [09/2018 - 10/2020] , or refer to PROCEDURE - Step 43 [10/2020 - 10/2022] , or refer to PROCEDURE - Step 43 [10/2022 - 10/2023] , or refer to PROCEDURE - Step 43 [10/2023 - ]

  9. DRAIN ENGINE COOLANT 

    Refer to REPLACEMENT [12/2017 - ]

  10. DISCONNECT NO. 1 AIR TUBE ASSEMBLY 
    1. Remove the 2 bolts.
      GTY817571Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Detach the wire harness clamp.
    3. Detach the clamp.
      GTY817575Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Slide the clip, disconnect the No. 4 air hose from the No. 1 turbo pressure sensor.
    5. Disconnect the No. 1 air tube assembly connector.
      GTY836533Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Loosen the clamp.
    7. Slide the clip, disconnect the No. 1 air tube assembly.
  11. DISCONNECT NO. 2 AIR TUBE ASSEMBLY 
    1. Remove the 2 bolts.
      GTY817572Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Detach the clamp.
      GTY817583Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Slide the clip, disconnect the No. 5 air hose from the No. 1 turbo pressure sensor.
    4. Disconnect the No. 2 air tube assembly connector.
      GTY817275Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Loosen the clamp.
    6. Slide the clip, disconnect the No. 2 air tube assembly.
  12. REMOVE THROTTLE BODY WITH MOTOR ASSEMBLY (for Bank 1) 
    1. Remove the bolt.
      GTY817302Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Detach the 3 wire harness clamps.
      GTY794633Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Remove the bolt.
      GTY817300Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Disconnect the throttle body with motor assembly connector.
      GTY786894Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Remove the 4 bolts and throttle body with motor assembly from the No. 1 air tube assembly and intake air surge tank assembly with intercooler.
      NOTE:

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

    6. Slide the 2 clips, disconnect the No. 3 water by-pass hose and No. 5 water by-pass hose from the throttle body with motor assembly.
      GTY786895Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    7. Remove the gasket from the throttle body with motor assembly.
    8. Remove the gasket from the intake air surge tank assembly with intercooler.
      GTY829852Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  13. REMOVE THROTTLE BODY WITH MOTOR ASSEMBLY (for Bank 2) 
    1. Remove the bolt.
      GTY817301Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Detach the 3 wire harness clamps.
      GTY836540Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Remove the bolt.
      GTY817299Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Disconnect the throttle body with motor assembly connector.
      GTY786880Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Remove the 4 bolts and throttle body with motor assembly from the No. 2 air tube assembly and intake air surge tank assembly with intercooler.
      NOTE:

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

    6. Slide the 2 clips, disconnect the No. 4 water by-pass hose and No. 6 water by-pass hose from the throttle body with motor assembly.
      GTY786881Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    7. Remove the gasket from the throttle body with motor assembly.
    8. Remove the gasket from the intake air surge tank assembly with intercooler.
      GTY786883Courtesy 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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