This procedure covers removal and replacement of the rear door window regulator assembly on a 2016-2021 Honda Civic with 1.5L turbo engine.

Warnings

Tools required

Parts

• Rear window regulator assembly × 1 — Use OEM specification for left or right side
• Door panel clips (replacement set) × 1 — Honda OEM door panel clip set

Preparation

1. Park vehicle on level surface and engage parking brake
2. Disconnect negative battery terminal to disable power windows and prevent accidental activation
3. Open rear door fully and ensure adequate working space
4. Roll rear window to approximately mid-position before disconnecting battery if window is functional

Procedure

1. 1

   Remove door panel fasteners
   Remove the Phillips screw from the door pull handle recess. Remove the small cover behind the interior door handle and remove the screw beneath it. Carefully pry off the power window switch panel using a trim tool, starting from the rear edge. Disconnect the electrical connector from the switch assembly.
2. 2

   Remove door panel
   Using a panel removal tool, carefully pry around the perimeter of the door panel to release the retaining clips. Start at the bottom rear corner and work your way around. Lift the door panel upward to disengage it from the door frame, then pull it away from the door. Disconnect any remaining electrical connectors for speakers or courtesy lights.
3. 3

   Remove water shield
   Carefully peel back the plastic water shield from the door frame. Work slowly to avoid tearing the shield. If the adhesive is strong, use a heat gun on low setting to soften it. Keep the shield intact for reinstallation.
4. 4

   Secure window glass
   Raise the window glass to the full up position manually if needed. Use masking tape to secure the window glass to the door frame, running tape strips from the glass to the exterior door frame to prevent the glass from falling when the regulator is removed.
   ⚠Ensure window glass is fully supported before proceeding to prevent damage or injury from falling glass
5. 5

   Disconnect regulator motor
   Locate the window regulator motor electrical connector inside the door cavity. Press the release tab and disconnect the connector from the motor. Tuck the connector aside to prevent damage during regulator removal.
6. 6

   Disconnect glass from regulator
   Locate the two bolts securing the window glass channel to the regulator lift mechanism. Remove these mounting bolts using a 10mm socket. Carefully slide the glass upward and away from the regulator mechanism while keeping it taped in the up position.
   ⚠Support the glass during bolt removal to prevent it from shifting or falling
   Torque spec

   Module Mounting Bolts8 Nm (6 lb-ft)
7. 7

   Remove regulator assembly mounting bolts
   Locate the regulator assembly mounting bolts (typically 3-4 bolts) securing the regulator track and motor assembly to the door frame. Remove all mounting bolts using a 10mm socket. Note the position of any brackets or spacers for reinstallation.
   Torque spec

   Module Mounting Bolts8 Nm (6 lb-ft)
8. 8

   Remove regulator assembly
   Carefully maneuver the regulator assembly out through the large service opening in the door frame. You may need to angle and rotate the assembly to clear the door structure. Remove the old regulator from the door and set it aside.
9. 9

   Install new regulator assembly
   Position the new regulator assembly and carefully maneuver it into the door cavity through the service opening. Align the mounting holes with the door frame. Install all regulator mounting bolts finger-tight, ensuring any brackets or spacers are properly positioned. Torque the mounting bolts to specification in a cross-pattern.
   Torque spec

   Module Mounting Bolts8 Nm (6 lb-ft)
10. 10

    Reconnect glass to regulator
    Lower the window glass carefully and align the glass channel with the regulator lift mechanism. Install the two glass mounting bolts and torque to specification. Remove the tape securing the glass to the door frame.
    Torque spec

    Module Mounting Bolts8 Nm (6 lb-ft)
11. 11

    Test regulator operation
    Reconnect the regulator motor electrical connector. Temporarily reconnect the negative battery terminal. Test the window operation through full up and down cycles to verify smooth operation and proper alignment. Listen for any unusual noises. Disconnect the battery again before continuing.
    ℹ️If window binds or operates roughly, check glass alignment and regulator mounting bolt torque
12. 12

    Reinstall water shield
    Clean any old adhesive from the door frame if necessary. Carefully reposition the water shield over the door cavity, ensuring it seals completely around all edges. Press firmly to ensure good adhesion. Replace the shield if it was damaged during removal.
13. 13

    Reinstall door panel
    Reconnect any electrical connectors for speakers or courtesy lights. Position the door panel over the door frame and engage the top edge first. Press firmly around the perimeter to seat all retaining clips. Install the screw behind the interior door handle. Install the door pull handle screw. Reconnect and install the power window switch panel.

Reassembly

1. Ensure all electrical connectors are fully seated with audible clicks
2. Verify all door panel clips are properly engaged before torquing screws
3. Check that water shield is fully sealed to prevent moisture intrusion

Verification

• Reconnect negative battery terminal and torque to 6.0 Nm
• Test window operation through multiple complete up and down cycles
• Verify window auto-up and auto-down features work properly (re-initialize if necessary by holding switch up for 2 seconds after window is fully closed)
• Check for proper window sealing when fully closed
• Verify no rattles or abnormal noises from door panel during window operation
• Confirm all door panel switches and features operate correctly

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