Blower Motor

Remove and replace the HVAC blower motor assembly, requiring removal of the glovebox, footwell trim, and associated components to access the blower motor housing on the passenger side.

Warnings

Tools required

Parts

• HVAC blower motor assembly × 1 — Use OEM specification
• Blower motor resistor/regulator (if equipped) × 1 — Use OEM specification
• Trim panel clips (replacement set) × 1 — Assorted interior trim clips

Preparation

1. Ensure the ignition is off and the key is removed from the vehicle
2. Disconnect the negative battery cable and secure away from the battery terminal
3. Allow the vehicle interior to reach ambient temperature if climate control has been recently operated
4. Set the front passenger seat to its full rear and upward position to maximize footwell access
5. Protect the door sill and carpet with clean shop towels or fender covers

Procedure

1. 1

   Remove glovebox assembly
   Open the glovebox fully. Remove the damper strut from the right side by releasing the clip at the glovebox mounting point. Locate and remove the Torx fasteners securing the glovebox hinge brackets to the dashboard structure (typically 4 fasteners total, 2 per side). Carefully withdraw the glovebox assembly forward while supporting its weight. Disconnect any illumination wiring harness from the glovebox light if equipped. Set the glovebox aside in a protected area.
2. 2

   Remove lower passenger footwell trim panel
   From the passenger footwell, identify the lower trim panel that covers the area beneath where the glovebox was mounted. Locate the Torx fasteners along the upper edge and any additional fasteners near the door sill area. Remove all visible fasteners. Gently release any remaining clips by carefully pulling the panel away from the body using trim tools at clip locations. Disconnect any harness connectors for footwell lighting if present. Remove and set aside the trim panel.
3. 3

   Remove side footwell trim (if present)
   Inspect the passenger-side footwell wall for an additional vertical trim panel covering the side of the HVAC housing area. If present, locate and remove the Torx fasteners securing this panel (typically along the top and bottom edges). Use trim tools to release any clips holding the panel to the body structure. Remove the panel to expose the blower motor housing area.
4. 4

   Disconnect blower motor wiring harness
   Locate the blower motor electrical connector, which is typically a multi-pin connector attached to the motor housing or a nearby bracket. Press the locking tab and carefully disconnect the harness from the blower motor. If a separate blower resistor or control module is visible and connected, disconnect its harness as well. Secure the disconnected harnesses away from the work area to prevent damage.
5. 5

   Remove blower motor housing fasteners
   Identify the blower motor housing, which is a circular or oval assembly located in the lower passenger side HVAC plenum. The housing is typically secured by 3-4 screws around its perimeter. Remove all Torx or Phillips fasteners securing the blower motor housing to the HVAC case. Note the location and type of each fastener as some may be different lengths or have sealing washers. Use an extension and appropriate socket or driver to reach fasteners in tight locations.
6. 6

   Remove blower motor assembly
   With all fasteners removed, carefully rotate and withdraw the blower motor assembly from the HVAC housing. The motor typically exits at an angle due to the fan cage diameter. Guide the assembly down and out through the footwell access area, taking care not to contact the fan cage against the housing edges. If resistance is encountered, verify all fasteners have been removed and check for any mounting tabs or alignment pins that may need to be disengaged. Remove the motor completely from the vehicle.
7. 7

   Inspect and clean mounting area
   With the blower motor removed, inspect the HVAC housing opening for debris, leaves, or foreign material that may have entered through the fresh air intake. Clean the mounting surface and seal contact area using a clean cloth. Inspect the housing for cracks or damage. Check the condition of any sealing gasket or foam seal on the motor housing flange; replace if torn or compressed.
8. 8

   Prepare new blower motor for installation
   Remove the new blower motor from its packaging and verify it matches the original unit in mounting configuration and electrical connector type. Verify the fan cage rotates freely and is not damaged. If the motor includes a new seal or gasket, ensure it is properly positioned on the motor flange. Confirm the electrical connector orientation matches the original to prevent installation at the wrong angle.
9. 9

   Install blower motor assembly
   Guide the new blower motor assembly into the HVAC housing opening, orienting it to align the mounting holes with the housing. The motor may need to be inserted at an angle and then rotated into final position due to the fan cage diameter. Ensure the seal seats fully against the housing flange. Align all mounting holes and verify no wiring or seal material is pinched.
   Torque spec

   Blower Motor Mounting Screw4 Nm (3 lb-ft)
10. 10

    Install blower motor fasteners
    Install all blower motor mounting screws by hand first to ensure proper thread engagement and alignment. Once all fasteners are started, tighten them in a cross-pattern sequence to ensure even sealing pressure. Tighten each fastener snugly by feel (blower motor screws into plastic HVAC housing are low-torque; verify exact specification against Aston Martin service documentation before applying a torque wrench). Verify the motor housing sits flush against the HVAC case with no gaps. Note: Tighten each fastener securely by feel until the housing seats flush (verify the manufacturer-specified torque for the blower motor mounting screws in Aston Martin service documentation; these small plastic-housing screws are typically very low torque, do not over-tighten). Note: Torque each fastener to the Aston Martin specified value (verify the exact blower housing screw torque in OEM service documentation; these small plastic-housing screws are low-torque, do not over-tighten) using a calibrated torque wrench.
    Torque spec

    Blower Motor Mounting Screw4 Nm (3 lb-ft)
11. 11

    Reconnect blower motor wiring
    Reconnect the blower motor electrical harness to the motor connector, ensuring the locking tab clicks into place. If a separate blower resistor or control module was disconnected, reconnect its harness as well. Verify all connections are secure and properly seated. Route any wiring away from moving components or sharp edges.
12. 12

    Test blower motor operation
    Temporarily reconnect the negative battery cable. Turn the ignition to the accessory or run position without starting the engine. Activate the climate control system and test the blower motor across its full range of speed settings (verify the exact number of fan speeds for the 2009 DB9 climate control in service documentation). Verify smooth operation with no unusual noise, vibration, or rubbing sounds. Check that airflow is appropriate at each speed setting. If operation is confirmed normal, turn off the ignition and disconnect the battery again for trim reinstallation.
13. 13

    Reinstall side footwell trim
    If a side footwell trim panel was removed, position it back into place, aligning any locating tabs or clips with their receptacles in the body structure. Press firmly at clip locations to seat the clips. Reinstall all Torx fasteners and tighten securely by feel (interior trim fasteners typically do not require torque specification). Reconnect any harness connectors for lighting if present.
14. 14

    Reinstall lower passenger footwell trim panel
    Position the lower footwell trim panel, reconnecting any footwell lighting harness first. Align the panel with its mounting points and press firmly at clip locations to engage the clips. Install all Torx fasteners along the upper edge and door sill area, tightening securely. Verify the panel sits flush with adjacent trim pieces and all gaps are even.
15. 15

    Reinstall glovebox assembly
    Reconnect the glovebox illumination wiring harness if equipped. Position the glovebox assembly into the dashboard opening, aligning the hinge brackets with their mounting points. Install all Torx fasteners securing the hinge brackets (typically 4 fasteners total, 2 per side) and tighten securely. Reinstall the damper strut to the right side mounting point, ensuring the clip engages fully. Open and close the glovebox several times to verify smooth operation and proper damper function.

Reassembly

1. Reconnect the negative battery cable and tighten the terminal connection securely
2. Perform window re-initialization if required by the vehicle (hold each window switch up until window is fully closed, then continue holding for 2 seconds)
3. Reset the clock and radio presets as needed
4. Return the front passenger seat to the desired position

Verification

• Start the engine and test the climate control system at all blower speed settings, confirming smooth and quiet operation
• Verify appropriate airflow volume at each speed setting and confirm air is directed properly through all selected vents
• Listen for any unusual noises such as rubbing, squealing, or rattling that would indicate improper installation or debris in the housing
• Inspect all reinstalled trim panels and glovebox for proper fit, alignment, and secure fastening with no rattles or loose components
• Confirm all interior lighting functions properly, including glovebox and footwell lights if equipped

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