LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Honda >> 2021 >> Pilot EX, AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System / Engine Mechanical - Service Information >> Removal And Installation >> Warm Up TWC >> Removal and Installation
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Removal and Installation

Front Bank (Bank 2) 

  1. Front WU-TWC Bracket - Loosen
    GHH308663Courtesy of HONDA, U.S.A., INC.
    1. Loosen or remove the front WU-TWC bracket mounting bolts (A).

    2. Remove the self-locking nuts (B).

  2. Engine Cover - Remove
  3. EGR Pipe A - Remove 
  4. Front A/F Sensor (Sensor 1) - Remove 
  5. A/C Condenser Fan Shroud Assembly - Remove
  6. Front WU-TWC - Remove
    Fig 1: Front WU-TWC With Torque Specifications
    GHH308664Courtesy of HONDA, U.S.A., INC.
    1. Carefully remove the front WU-TWC (A) assembly.
  7. WU-TWC Covers - Remove
    GHH308665Courtesy of HONDA, U.S.A., INC.
  8. All Removed Parts - Install
    Fig 2: WU-TWC Bracket Mounting Bolts With Torque Specifications
    GHH308666Courtesy of HONDA, U.S.A., INC.
    1. Install the parts in the reverse order of removal with new gaskets and new self-locking nuts.
    • Before installing the WU-TWC, install the WU-TWC covers.
    • Tighten the WU-TWC bracket mounting bolts in the numbered sequence shown.


Rear Bank (Bank 1) 

  1. Stabilizer Link - Remove

    Remove the right side stabilizer link .

  2. Under-Floor TWC - Remove - Refer to:

    Under-Floor TWC Removal and Installation 

    Warm Up TWC Removal and Installation 

  3. Rear A/F Sensor (Sensor 1) - Remove 
  4. Rear Secondary HO2S (Sensor 2) - Remove 
  5. Rear WU-TWC Bracket - Remove
    GHH308667Courtesy of HONDA, U.S.A., INC.
  6. Rear Engine Mount Heat Shield - Remove
    Fig 1: Rear Engine Mount Heat Shield
    GHH308668Courtesy of HONDA, U.S.A., INC.

    Remove the rear engine mount heat shield (A).

  7. Power Steering Heat Shield - Remove
    GHH308669Courtesy of HONDA, U.S.A., INC.

    Remove the power steering heat shield (A).

  8. Rear WU-TWC - Remove
    Fig 2: Rear WU-TWC With Torque Specifications
    GHH308670Courtesy of HONDA, U.S.A., INC.
    1. Remove the nuts (A).
    GHH308671Courtesy of HONDA, U.S.A., INC.
    2. Turn the WU-TWC (A) as shown.
    GHH308672Courtesy of HONDA, U.S.A., INC.
    3. Turn the WU-TWC (A), then take it out by turning it as shown.
  9. WU-TWC Covers - Remove
    GHH308673Courtesy of HONDA, U.S.A., INC.
  10. All Removed Parts - Install
    Fig 3: WU-TWC Bracket Mounting Bolts With Torque Specifications
    GHH308674Courtesy of HONDA, U.S.A., INC.
    1. Install the parts in the reverse order of removal with new gaskets and new self-locking nuts.
    • Before installing the WU-TWC, install the WU-TWC covers.
    • Tighten the WU-TWC bracket mounting bolts in the numbered sequence shown.