2021 Lexus NX 300h BaseFACTORY OEM SERVICE PROCEDURE

Removal [10/2014 - ]: Procedure

  1. 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 - ]

  2. REMOVE IGNITION COIL ASSEMBLY 
    1. GTY520712Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Disconnect the 4 ignition coil assembly connectors.

    2. Remove the 4 bolts and 4 ignition coil assemblies.
      GTY512099Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:

      Replace with a new part if it is dropped or if it receives a strong impact.

  3. REMOVE SPARK PLUG 
    1. GTY513168Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a 16 mm Spark Plug Wrench

      Using a 16 mm spark plug wrench, remove the 4 spark plugs.

      NOTE:

      Replace with a new part if it is dropped or if it receives a strong impact.

Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

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.