This procedure replaces the rear window motor and regulator assembly on a 2014-2019 Toyota Corolla sedan, restoring proper window operation.

Warnings

Tools required

Parts

• Rear window motor and regulator assembly × 1 — Use OEM specification
• Door panel clips (replacement set) × 1 — Use OEM specification
• Vapor barrier (if damaged) × 1 — Use OEM specification

Preparation

1. Park vehicle on level surface and engage parking brake
2. Disconnect negative battery terminal and wait 3 minutes to discharge airbag system capacitors
3. Roll the affected rear window to approximately mid-height position if motor still operates; if not, mark current position
4. Gather all tools and new parts before beginning disassembly

Procedure

1. 1

   Remove rear door panel
   Remove the Phillips screw from the door pull handle recess. Use trim tools to carefully pry off the power window switch bezel from the armrest. Disconnect the window switch electrical connector. Insert trim tools around the perimeter of the door panel and release all retaining clips. Lift the door panel upward to disengage it from the window sill, then remove from door.
2. 2

   Remove or peel back vapor barrier
   Carefully peel back the plastic vapor barrier sheet to access the window regulator and motor assembly. You may need to remove it entirely or can fold it back and secure with masking tape. Take care not to tear the barrier as it provides moisture protection.
3. 3

   Disconnect window motor electrical connector
   Locate the window motor electrical connector inside the door. Press the locking tab and disconnect the connector from the motor. Secure the connector to prevent it from falling into the door cavity.
4. 4

   Secure the window glass
   Position the window glass approximately 6-8 inches from the fully closed position. Use masking tape to secure the glass to the door frame, taping from the glass to the exterior door panel. This prevents the glass from falling when you disconnect the regulator. Alternatively, have an assistant hold the glass in position.
5. 5

   Disconnect window glass from regulator
   Locate the two bolts that attach the window glass to the regulator lift channel through access holes in the door frame. Use an 8mm or 10mm socket (depending on year) to remove these bolts. Carefully separate the glass from the regulator channel and ensure it remains securely taped or supported.
6. 6

   Remove window regulator mounting bolts
   Locate all regulator mounting bolts (typically 3-4 bolts) securing the regulator and motor assembly to the inner door frame. Remove these bolts using a 10mm socket. Note the position of any ground straps or brackets attached to these bolts.
   Torque spec

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

   Remove regulator and motor assembly
   Carefully maneuver the window regulator and motor assembly out through the large service opening in the door frame. You may need to rotate and angle the assembly to clear the door structure. Feed the motor connector through as you remove the assembly.
8. 8

   Install new regulator and motor assembly
   Position the new window regulator and motor assembly and carefully insert it through the door service opening. Orient the assembly to match the original mounting hole positions. Ensure any ground straps are positioned correctly on their mounting points.
   Torque spec

   Module Mounting Bolts8 Nm (6 lb-ft)
9. 9

   Reconnect window glass to regulator
   Align the window glass with the regulator lift channel. Insert and hand-tighten the window glass mounting bolts through the access holes. Verify proper alignment before final tightening to ensure smooth window operation.
10. 10

    Connect electrical connector and test operation
    Connect the window motor electrical connector. Temporarily reconnect the negative battery terminal and the window switch. Test window operation through full up and down travel before final reassembly. Verify smooth operation without binding or unusual noises. Disconnect battery again before continuing.
11. 11

    Reinstall vapor barrier and door panel
    Carefully reposition and press the vapor barrier back into place, ensuring all adhesive areas are sealed. Replace any damaged clips on the door panel with new ones. Reconnect the window switch connector. Position the door panel, engage the top edge over the window sill, then press firmly around the perimeter to seat all clips. Reinstall the door pull handle screw.
    Torque spec

    Cover Screws10 Nm (8 lb-ft)
12. 12

    Reconnect battery and recalibrate window
    Reconnect the negative battery terminal. If the vehicle has auto-up/down feature, recalibrate by fully closing the window, then continue holding the switch up for 2 seconds. Fully open the window, then continue holding the switch down for 2 seconds. This resets the window position memory.
    Torque spec

    Battery Terminal Bolts6 Nm (4 lb-ft)

Reassembly

1. Ensure all door panel clips are fully seated and the panel is secure with no gaps
2. Verify the vapor barrier is properly sealed to prevent moisture intrusion and wind noise
3. Test window operation multiple times in both directions to confirm proper installation

Verification

• Operate the window through complete up and down cycles several times, listening for smooth motor operation and no binding
• Verify the window seals properly at the top of the door frame when fully closed
• Check that auto-up/down function works correctly if equipped
• Confirm no rattling or unusual noises from the door panel or window mechanism
• Verify all door panel trim pieces and switches are properly secured

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