Trunk/Liftgate Actuator

This procedure covers removal and replacement of the trunk/liftgate actuator on a 2009 Aston Martin DB9, including interior trim removal and actuator access through the trunk cavity.

Warnings

Tools required

Parts

• Trunk/liftgate actuator assembly × 1 — Use OEM Aston Martin specification
• Trim panel retaining clips (if damaged) × 1 — Use OEM specification

Preparation

1. Park vehicle on level surface and engage parking brake.
2. Ensure trunk/liftgate is fully closed before beginning work.
3. Open hood and disconnect negative battery terminal to prevent accidental trunk actuation during repair. Allow 10 minutes for system capacitors to discharge.
4. Gather all tools and replacement actuator. Verify new actuator matches existing unit before beginning disassembly.
5. Protect trunk finish with soft towels or blankets in work area.

Procedure

1. 1

   Remove Trunk Side Trim Panels
   Open the trunk. Locate and remove the trunk side trim panels to access the actuator mounting area. The trim panels are secured with plastic push-clips and Torx fasteners along the perimeter. Check carefully for all fasteners before attempting to remove panels - there are typically fasteners along the top edge, rear edge, and bottom sill area. Use a flat trim tool to carefully release the push-clips after fasteners are removed. Work slowly to avoid breaking clips. Remove the trim panel(s) necessary to access the central rear trunk latch area where the actuator is mounted (verify mounting location on this vehicle before committing to one side). Note: Trunk lid latch/release actuator assembly Note: Confirm exact OEM Aston Martin part number against manufacturer documentation for the 2009 DB9 trunk latch actuator before ordering. Note: Remove the trim panel(s) necessary to access the centrally-mounted trunk latch actuator area; verify actual actuator location before removing panels, as the DB9 trunk latch is located centrally at the rear.
2. 2

   Remove Trunk Rear Trim Panel
   With side panel removed, access to the rear trunk trim panel is now available. This panel covers the trunk latch mechanism and actuator assembly. Remove Torx fasteners securing the rear trim panel (check along top edge and sides). Gently pull the panel away from the body, releasing any remaining clips. Set panel aside in a protected area. You should now see the trunk latch assembly and actuator mechanism. Note: Window one-touch relearn may be required after reconnection on some models; verify against DB9 service documentation.
3. 3

   Locate and Inspect Trunk Actuator
   Identify the trunk actuator assembly. It is an electric latch/release unit integrated with or mounted directly to the trunk latch mechanism; verify whether it acts directly on the latch or via a linkage before proceeding. Inspect the actuator for physical damage, broken mounting tabs, or signs of water intrusion. Note the routing of the electrical connector and any securing brackets. Take a photo of the installation for reference during reassembly.
4. 4

   Disconnect Actuator Electrical Connector
   Locate the electrical connector attached to the actuator body. The connector typically has a locking tab or clip that must be depressed or lifted before removal. Press the release tab and carefully pull the connector straight off the actuator terminals. Do not pull on the wiring - grasp the connector body. If connector is difficult to release, use an electrical connector release tool. Mark connector orientation with masking tape if desired for easier reinstallation.
5. 5

   Disconnect Actuator Linkage from Latch
   The actuator connects to the trunk latch mechanism via a plastic or metal linkage rod. Identify the connection point where the actuator arm attaches to the latch linkage. This typically uses a ball-and-socket style connection or clip. Carefully pry or release the linkage connection using a flat tool. Note the exact orientation and position of the linkage for reinstallation. Some force may be required, but avoid breaking plastic components.
6. 6

   Remove Actuator Mounting Fasteners
   The actuator is secured to the trunk structure with mounting fasteners. Locate all mounting points - typically there are 2-3 fasteners securing the actuator bracket to the body. Fastener type and size are not confirmed for this vehicle — verify against OEM documentation before selecting a tool (commonly Torx or hex). Remove all mounting fasteners completely and set aside. Support the actuator with one hand while removing the final fastener to prevent it from falling. Note: Fastener type and size must be verified against Aston Martin service documentation for the 2009 DB9 before removal. Note: Fastener type and size must be confirmed against OEM documentation (commonly metric Torx or hex-head on DB9); do not assume a specific size.
7. 7

   Remove Actuator Assembly
   With all fasteners and connections removed, carefully maneuver the actuator assembly out of the mounting location. The space is confined, so you may need to rotate or angle the actuator to clear surrounding structures. Once removed, compare the old actuator to the new replacement unit to confirm they match in physical size, mounting hole locations, connector type, and linkage arm configuration.
8. 8

   Install New Actuator Assembly
   Position the new actuator into the mounting location, orienting it to match the original installation position. Align the mounting holes with the body structure. The linkage arm should be positioned to easily connect to the latch mechanism. You may need to angle the actuator through the confined space just as during removal.
9. 9

   Install Actuator Mounting Fasteners
   Insert and hand-tighten all mounting fasteners to secure the actuator to the body structure. Once all fasteners are started, tighten them to the OEM-specified torque (verify spec against Aston Martin service documentation before torquing; do not overtighten into aluminum structure). Tighten in a cross-pattern if multiple fasteners are present to ensure even clamping pressure. The exact torque value must be confirmed from OEM documentation for the 2009 DB9 and is not estimated here. typical small bracket fasteners of this size are approximately 7-9 ft-lbs / 9-12 Nm). Torque to the manufacturer specification (verify value against Aston Martin service documentation; typical small bracket fasteners of this size are approximately 7-9 ft-lbs / 9-12 Nm). Verify the actuator is firmly mounted with no excessive play or movement. Note: Once all fasteners are started, tighten to the OEM-specified torque (typically around 7-9 ft-lbs / ~10 Nm for small M6 bracket fasteners — verify against Aston Martin documentation) to avoid stripping threads.
10. 10

    Connect Actuator Linkage to Latch
    Reconnect the actuator linkage arm to the trunk latch mechanism. Align the ball-and-socket or clip connection and press firmly until you hear or feel a positive engagement click. Verify the connection is secure by gently tugging on the linkage - it should not separate. Ensure the linkage moves freely without binding.
11. 11

    Reconnect Actuator Electrical Connector
    Reconnect the electrical connector to the new actuator. Align the connector with the actuator terminals and press firmly until the locking tab clicks into place. Verify the connection is fully seated and secure. Ensure wiring is routed properly and will not be pinched by trim panels during reinstallation.
12. 12

    Reinstall Trunk Trim Panels
    Reinstall the rear trunk trim panel first, aligning all mounting points and clips. Press firmly to engage push-clips, then install all Torx fasteners. Next, reinstall the side trim panel, ensuring all clips are aligned before pressing into place. Install all side panel fasteners. Verify all panels are flush and properly seated with no gaps or misalignment.
13. 13

    Reconnect Battery and Test System
    Reconnect the negative battery terminal (battery is located in the trunk/rear of the vehicle on the DB9, not the engine bay). Tighten the terminal bolt securely. Turn the ignition to the ON position (engine off). Use the trunk release button (interior or key fob) to test the new actuator function. The trunk should unlatch smoothly without binding or unusual noise. Test multiple cycles to confirm reliable operation. Close the trunk and verify it latches securely. Note: Disconnecting the battery may reset certain vehicle settings (such as radio presets and window one-touch/anti-pinch calibration). Window relearn may be required after reconnection — consult OEM procedure for which settings are affected on this vehicle.

Reassembly

1. Reinstall all trim panels in reverse order of removal, ensuring all clips and fasteners are properly secured.
2. Verify all electrical connections are secure and wiring is properly routed away from moving parts.
3. After battery reconnection, perform window recalibration by fully lowering and raising each window to relearn automatic positions.
4. Test trunk operation multiple times before returning vehicle to service to ensure proper actuator function.

Verification

• Test trunk release from interior button - trunk should unlatch immediately with audible click.
• Test trunk release from key fob - verify remote operation functions correctly.
• Manually verify trunk latch engages fully when closed - trunk should not rattle or show any movement when latched.
• Listen for abnormal noises during actuation - operation should be smooth and quiet.
• Check that all trunk trim panels are secure with no rattles or loose sections.
• Verify trunk interior light functions correctly when trunk is opened.
• Confirm trunk safety release (interior emergency release) still functions if so equipped.

Related trouble codes on this vehicle

Codes that commonly send this job to the bay — tap one for symptoms, causes, and diagnostic steps.

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