2021 Lexus NX 300h BaseFACTORY OEM SERVICE PROCEDURE

Removal [10/2014 - ]: Procedure

  1. DRAIN ENGINE COOLANT 

    Refer to PROCEDURE - Step 1

  2. REMOVE NO. 1 ENGINE COVER SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 21 [10/2014 - 09/2016], or refer to PROCEDURE - Step 21 [09/2016 - 05/2019], or refer to PROCEDURE - Step 21 [05/2019 - ]

  3. REMOVE ENGINE COOLANT TEMPERATURE SENSOR 
    1. Disconnect the engine coolant temperature sensor connector.
      GTY512103Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the 2 bolts and disconnect the 2 ground wires.
    3. Using a 19 mm ball joint lock nut wrench, remove the engine coolant temperature sensor and gasket.
      GTY515309Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Engine Coolant Temperature Sensor
      *2 Gasket
      *a 19 mm Ball Joint Lock Nut Wrench
Factory Service Tools

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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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