Power Window Regulator - Rear

This procedure covers the removal and replacement of the rear power window regulator assembly on a 2017 Maserati Levante, including door panel removal, glass positioning, and electrical connections.

Warnings

Tools required

Parts

• Rear window regulator assembly × 1 — Use OEM specification
• Door panel clips (if damaged) × 1 — Maserati OEM door clips
• Vapor barrier adhesive (if needed) × 1 — 3M automotive adhesive

Preparation

1. Park vehicle on level surface and engage parking brake
2. Disconnect negative battery terminal and wait 2 minutes for systems to discharge
3. Roll rear window down approximately 50% or to a position where regulator mounting bolts are accessible through door access holes
4. Gather all tools and parts before beginning
5. Cover rear seat with protective material to prevent damage from tools or parts

Procedure

1. 1

   Remove rear door panel
   Remove the screw cover cap from the door pull handle. Remove the Phillips screw behind it. Use the trim removal tool to carefully pry around the perimeter of the door panel, releasing all retaining clips. Work slowly to avoid breaking clips. Disconnect the door lock switch connector and any other electrical connectors accessible from the back of the panel. Lift the door panel up and away from the door frame.
2. 2

   Remove door speaker assembly
   Remove the T20 Torx screws securing the rear door speaker assembly (typically 3-4 screws). Disconnect the speaker electrical connector. Remove the speaker from the door to gain access to the regulator mounting area.
3. 3

   Peel back vapor barrier
   Carefully peel back the plastic vapor barrier sheet from the door to expose the window regulator mechanism. Only peel back as much as necessary to access the regulator and motor. Take care not to tear the barrier as it provides water protection.
4. 4

   Secure window glass in raised position
   Manually raise the window glass to the fully up position. Secure it in place using window support props or carefully applied wide tape from the glass to the top of the door frame. Ensure the glass cannot drop during regulator removal. This is critical for safety and to prevent glass damage.
5. 5

   Disconnect window motor electrical connector
   Locate the window motor electrical connector inside the door cavity. Press the locking tab and disconnect the connector from the motor. Note the routing of the wiring harness for proper reinstallation.
6. 6

   Disconnect glass from regulator
   Through the access holes in the door frame, locate the two bolts that secure the window glass to the regulator carrier. These are typically 10mm bolts. Remove these bolts while supporting the glass. The glass should now be free from the regulator but held by your support method.
7. 7

   Remove regulator motor mounting bolts
   Locate the regulator motor mounting bolts (typically 3 bolts) on the motor housing. Remove these bolts using a 10mm socket. Keep track of any spacers or washers. The motor may be under slight spring tension.
   Torque spec

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

   Remove regulator track mounting bolts
   Locate and remove the bolts securing the regulator track/rail assembly to the door frame (typically 2-3 mounting points). These are accessed through the service holes in the door frame. Support the regulator assembly as you remove the final bolt.
   Torque spec

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

   Extract old regulator assembly
   Carefully maneuver the regulator assembly out through the largest access opening in the door frame. This may require tilting and rotating the assembly. Take note of the orientation for installing the new unit. Inspect the door frame rails for any debris or damage.
10. 10

    Install new regulator assembly
    Position the new regulator assembly in the same orientation as the old unit. Carefully guide it through the door access opening and align it with the mounting points on the door frame. Ensure wiring is properly routed and not pinched.
11. 11

    Install regulator track mounting bolts
    Install and hand-tighten the regulator track mounting bolts through the access holes. Once all bolts are started, torque them to specification in a cross pattern to ensure even clamping.
    Torque spec

    Module Mounting Bolts8 Nm (6 lb-ft)
12. 12

    Install motor mounting bolts
    Position the regulator motor assembly at its mounting points. Install the motor mounting bolts and torque to specification. Ensure any ground straps are properly positioned under bolt heads if present.
    Torque spec

    Module Mounting Bolts8 Nm (6 lb-ft)
13. 13

    Reconnect motor and test operation
    Connect the window motor electrical connector. Temporarily reconnect the negative battery terminal. Before attaching the glass, test the regulator operation by cycling it up and down several times to verify smooth operation. Listen for any unusual noises. Disconnect battery again before proceeding.
    Torque spec

    Battery Terminal Bolts6 Nm (4 lb-ft)
14. 14

    Attach window glass to regulator
    Remove the temporary glass supports. Lower the window regulator carrier to align with the glass attachment points. Carefully lower the glass onto the regulator carrier and install the glass mounting bolts. Ensure proper alignment before tightening. Hand-tighten initially, then torque to proper specification.
15. 15

    Final assembly and testing
    Reposition and reseal the vapor barrier ensuring complete adhesion around edges. Reinstall the speaker assembly with its fasteners. Reconnect battery terminal and test window operation through full travel multiple times. Verify smooth operation and proper sealing at top and bottom positions. Reinstall door panel by aligning clips and pressing firmly, then install door handle screw and cover.
    Torque spec

    Battery Terminal Bolts6 Nm (4 lb-ft)

Reassembly

1. Ensure all electrical connectors are fully seated with audible clicks
2. Verify vapor barrier is properly sealed to prevent water intrusion into door cavity
3. Test window operation at least 3 full cycles before declaring job complete
4. Check that door panel clips are all properly engaged with no gaps
5. Verify window auto-up and auto-down functions work correctly (may require initialization procedure)

Verification

• Window should travel smoothly through full range without binding or unusual noises
• Window should seal properly at full up position with no wind noise or water leaks
• Window speed should be consistent in both up and down directions
• Auto-up and auto-down features (if equipped) should function correctly
• Door panel should be secure with no rattles or loose clips
• All door controls and switches should function normally

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