McLaren 720s Spider Tailgate 14AA049LP

part number 14AA049LP identifies the Genuine McLaren 720S Spider Rear Deck Lid (Tailgate) Main Assembly.

On the Spider, this component is significantly more complex than the Coupe’s fixed version. It serves as a dual-purpose panel: it acts as the engine service cover and the articulating tonneau cover that hinges to allow the Retractable Hard Top (RHT) to stow.

Component Overview

Because the 720S Spider features a mid-engine layout and a folding roof, the “Tailgate” refers to the large rear section that sits between the flying buttresses.

• Part Number: 14AA049LP

• Material: Lightweight Aluminum or Carbon Fiber (depending on MSO spec).

• Function: Houses the rear mesh grilles for engine heat extraction and provides the mounting points for the active rear spoiler mechanism.

• Compatibility: Exclusively for the 720S Spider (not compatible with the Coupe due to different hinge points and roof stowage requirements).

Key Features & Integration

• Active Aero: This panel is designed to work in tandem with the Active Rear Spoiler. The hydraulics for the wing are often housed just beneath this lid.

• Thermal Management: The lid features precision-cut apertures for the engine bay chimneys. These chimneys are critical for cooling the M840T 4.0L V8, which can reach extreme temperatures.

• Visibility: On certain specs, this panel may include or interface with the glazed “C-pillars” (buttresses) that provide the 720S Spider with its class-leading 360° visibility.

Installation & Technical Considerations

• Hinge Calibration: If you are replacing this unit, the hinges (Part of the RHT Kinematics) must be perfectly aligned. Even a 1-2mm misalignment can cause the roof mechanism to “bind” or trigger a sensor error during the 11-second folding cycle.

• Paint Matching: This part is typically delivered in Primer from the factory unless ordered as a “take-off” part in a specific factory color (e.g., Elite Saros or Onyx Black).

• Latch System: It utilizes an electronic soft-close latch system. When installing, the electrical harness for the latch and the high-mount stop light (if integrated) must be routed through the protected looms to avoid pinching during roof movement.