Power Window Regulator - Front

Remove and replace the front door power window regulator assembly, including disconnecting the window motor, removing the door trim panel, and installing the new regulator mechanism.

Warnings

Tools required

Parts

• Front window regulator assembly × 1 — Use OEM specification
• Door panel trim clips (if damaged) × 1 — Use OEM specification

Preparation

1. Park vehicle on level surface and engage parking brake
2. Disconnect negative battery terminal and wait 2 minutes for airbag system to discharge
3. Lower the window approximately 4-6 inches from fully closed position to access regulator mounting bolts (if window still operates)
4. Prepare a clean workspace for removed trim panels to prevent scratching

Procedure

1. 1

   Remove door handle trim cover
   Carefully pry the interior door handle trim cover from its edge using a plastic trim tool, verifying the correct clip release direction against OEM documentation. The cover is secured by clips; disengage it in the direction specified for this vehicle. Disconnect any ambient lighting connectors if equipped. Note: The cover is secured by clips; confirm removal direction against factory documentation before prying to avoid breaking tabs. Note: Front window regulator assembly (confirm correct left/right-side Aston Martin OEM part number for 2009 DB9)
2. 2

   Remove door panel fasteners
   Locate and remove the door panel fasteners (type and count to be verified against OEM documentation). Verify the door panel fastener count and locations against OEM documentation. Locate and remove the fasteners securing the door panel, typically positioned around the perimeter such as behind the door handle area, lower door pull pocket, and along the bottom edge. Remove the fasteners and place them in a magnetic tray. Note: Verify the exact door panel fastener count, type, and locations against 2009 DB9 factory service documentation. Check behind the door handle area, lower door pull pocket, and along the bottom edge. Remove the fasteners and place them in a magnetic tray.
3. 3

   Release door panel clips and remove
   Starting at the bottom rear corner, use a trim tool to carefully release the perimeter clips securing the door panel to the door frame. Work your way around the panel, being mindful of the clips along the bottom and sides. Once clips are released, lift the panel upward to disengage it from the window sill retainer, then pull away from the door. Support the panel and locate the electrical connectors.
4. 4

   Disconnect door panel electrical connectors
   Disconnect all electrical connectors from the door panel: window switch module, door lock switch, and any ambient lighting or speaker connectors. Press the locking tabs and pull connectors straight apart. Remove the door panel completely and set aside on a clean protected surface.
5. 5

   Peel back water barrier
   Carefully peel back the plastic water barrier sheet far enough to access the window regulator assembly. Work slowly to avoid tearing the barrier, as it provides moisture protection. Use masking tape to temporarily secure the peeled section out of the way.
6. 6

   Secure the window glass
   If the window is movable, raise it to approximately 2-3 inches from the top of the door frame. Use masking tape across the top of the glass to the door frame exterior, or insert a support prop between the glass and bottom of the door cavity to prevent the window from dropping when disconnected from the regulator.
7. 7

   Disconnect window motor electrical connector
   Locate the window motor electrical connector and disconnect it by pressing the locking tab and pulling apart. The motor is typically mounted as part of the regulator assembly.
8. 8

   Disconnect window glass from regulator
   Locate the fasteners securing the window glass mounting bracket to the regulator lift mechanism (verify exact size and head type against OEM documentation). Remove the fasteners accessible through access holes in the door frame. Remove these bolts and carefully separate the glass from the regulator. Ensure the glass is securely supported. Note: Locate the fasteners securing the window glass mounting bracket to the regulator lift mechanism. Verify exact fastener size, type, and count against 2009 DB9 factory service documentation before removal, as these may be Torx rather than hex head. Remove the fasteners and carefully separate the glass from the regulator, ensuring the glass is securely supported. Note: Fastener size and count to be verified against OEM documentation before removal
9. 9

   Remove regulator mounting fasteners
   Locate and remove all regulator mounting fasteners securing the assembly to the door frame. Verify the regulator mounting fastener type, size, and exact count against OEM documentation before removal. Remove all regulator mounting fasteners securing the assembly to the door frame. Work methodically to identify all attachment points. Note: Verify the regulator mounting fastener type, size, and count against 2009 DB9 factory service documentation. Remove all mounting fasteners securing the assembly to the door frame, including any motor mounting fasteners and track rail fasteners. Work methodically to identify all attachment points. Note: Mounting fastener type and exact count to be verified against OEM documentation
10. 10

    Remove regulator assembly
    Carefully maneuver the regulator assembly out through the largest access opening in the door frame. The assembly includes the motor, lift arms, and guide rails. It may be necessary to tilt and rotate the assembly to clear the door structure. Work slowly to avoid damaging the door interior or scratching painted surfaces.
11. 11

    Install new regulator assembly
    Position the new regulator assembly into the door cavity, maneuvering it through the access opening. Align the mounting holes with the door frame attachment points. Ensure the lift mechanism is positioned to align with the window glass mounting bracket location and that the guide tracks are properly oriented in the door channels.
12. 12

    Install regulator mounting fasteners
    Install all regulator mounting fasteners hand-tight first to ensure proper alignment, then tighten to the OEM-specified torque in a cross-pattern sequence (verify torque value against Aston Martin documentation; M6 ≈ 7 ft-lbs / M8 ≈ 17 ft-lbs typical if unspecified). Verify that the regulator sits flush against the door frame and that all guide rails are properly seated in their channels.
    Torque spec

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

    Connect window glass to regulator
    Align the window glass mounting bracket with the regulator lift mechanism. Install and tighten the 2 bolts securing the glass to the regulator. Ensure the glass sits level and moves smoothly in the door channels before fully tightening.
14. 14

    Connect window motor electrical connector
    Reconnect the window motor electrical connector, ensuring it clicks into place with the locking tab engaged.
15. 15

    Test window operation
    Reconnect the battery negative terminal temporarily. Turn the ignition to accessory position and test window operation using the door switch. Verify smooth operation through full up and down travel. Check for binding, unusual noise, or misalignment. Perform window auto-up/auto-down calibration if required, following the Aston Martin OEM window initialization procedure for this vehicle. Disconnect battery again before completing reassembly. Note: Perform window auto-up/auto-down calibration if required per the 2009 DB9 factory relearn procedure. Verify the exact initialization sequence against factory documentation, as it may differ from generic hold-up/hold-down methods. Note: Reconnect the battery negative terminal and torque to the OEM-specified value (typically ~4-6 ft-lbs — verify against Aston Martin documentation)
    Torque spec

    Battery Terminal Bolts6 Nm (4 lb-ft)

Reassembly

1. Reposition and carefully press the water barrier sheet back into place, ensuring complete adhesion around all edges
2. Reconnect all door panel electrical connectors: window switch, door lock switch, lighting, and speaker connectors
3. Position the door panel by engaging the top edge into the window sill retainer, then press firmly around the perimeter to engage all clips until they click into place
4. Reinstall all door panel Torx fasteners and tighten securely
5. Reinstall the door handle trim cover by aligning clips and pressing firmly until seated
6. Reconnect the battery negative terminal and torque to specification
7. Perform final window calibration procedure if not completed during testing

Verification

• Test window operation through complete travel in both directions multiple times
• Verify auto-up and auto-down functions operate correctly (if equipped)
• Check that window seals properly against weatherstripping when fully closed
• Confirm no rattling, binding, or unusual noise during window operation
• Verify all door panel trim is securely fastened with no gaps or loose clips
• Test door lock and window switches for proper function
• Check that window stops at correct up and down positions without hesitation

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