2004 Lexus RX 330 FWDFACTORY OEM SERVICE PROCEDURE

ECM (3MZ-FE): Replacement

  1. REMOVE FRONT DOOR SCUFF PLATE RH 
  2. REMOVE INSTRUMENT PANEL UNDER COVER SUB-ASSY NO.2 
  3. REMOVE GLOVE COMPARTMENT DOOR ASSY 
  4. REMOVE ECM 
    1. Remove the 2 wire harness clamps.
    2. Disconnect the 5 ECM connectors.
    3. Remove the 2 nuts, and then remove the ECM.
      Fig 1: Locating ECM Removing Nuts
      G03010626Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Remove the 2 screws, and then remove the wire harness clamp bracket.
      Fig 2: Locating Wire Harness Clamp Bracket Removing Screws
      G03010627Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. REMOVE ECM BRACKET 
    1. Remove the 2 screws, and then remove the ECM bracket.
      Fig 3: Locating ECM Bracket Removing Screws
      G03010628Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. REMOVE ECM BRACKET NO.2 
    1. Remove the 2 screws, and then remove the ECM bracket.
      Fig 4: Locating ECM Bracket No.2 Removing Screws
      G03010629Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  7. INSTALL ECM BRACKET NO.2 
  8. INSTALL ECM BRACKET 
  9. INSTALL ECM 

    Torque: 5.5 N.m (56 kgf.cm, 49 in.lbf) 

  10. INSTALL GLOVE COMPARTMENT DOOR ASSY 
  11. INSTALL INSTRUMENT PANEL UNDER COVER SUB-ASSY NO.2 
  12. INSTALL FRONT DOOR SCUFF PLATE RH 
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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.