2003 Lexus GS 430FACTORY OEM SERVICE PROCEDURE

Ignition Coil: Replacement

  1. REMOVE V-BANK COVER
    Fig 1: Removing V-Bank Cover
    G00855882Courtesy of Β© TOYOTA, LICENSE AGREEMENT TMS1002
  2. REMOVE INTAKE AIR CONNECTOR PIPE
  3. REMOVE IGNITION COILS
    1. Disconnect the 8 ignition coil connectors.
    2. Remove the bolt, and pull out the ignition coil. Remove the 8 ignition coils.
  4. REINSTALL NEW IGNITION COILS
    1. Connect a new ignition coil to the spark plug, and attach the ignition coil to the cylinder head cover, and install the bolt. Install the 8 ignition coils.

      Torque: 7.5 N-m (80 kgf-cm, 66 in.-lbf)Β 

    2. Connect the 8 ignition coil connectors.
  5. REINSTALL INTAKE AIR CONNECTOR PIPE
  6. REINSTALL V-BANK COVER
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:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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