Aston Martin Rapide & Vanquish Deck Lid Module: Diagnosis and Critical Programming Info (2010-2018)

Vehicle Fitment

This guide covers the Deck Lid Control Module, also known as the Boot Auto Latch Controller, for the following vehicles:

• 2010-2018 Aston Martin Rapide (including Rapide S)
• 2013-2018 Aston Martin Vanquish

These models share a common electronic architecture, resulting in them using the same or interchangeable control modules for this function.

Symptoms of a Failing Deck Lid Control Module

When the deck lid control module begins to fail, it can cause a range of frustrating issues. Owners most commonly report problems with accessing the trunk. Be aware of these specific symptoms:

• Trunk Fails to Open: The most common symptom is the trunk lid failing to open when using the key fob, interior button, or the external release button. You may hear a faint click from the trunk area, which often indicates the module is sending a signal, but the latch mechanism isn't fully disengaging.
• Trunk Lid Cycles or Won't Stay Closed: In some cases, the release mechanism may activate continuously, causing the trunk to pop open immediately after you try to close it.
• Intermittent Operation: The trunk may work correctly sometimes and fail at other times without a clear pattern.
• 'Trunk Lid Open' Warning Light: The dashboard may display a warning that the trunk is open even when it is securely closed.
• Stuck Trunk Lid: The lid might partially release but not open fully, and then become stuck when you try to push it closed again.

It's important to note that these symptoms can also be caused by a faulty latch mechanism, a misaligned soft-close switch, or wiring problems, particularly corrosion in the trunk area.

Diagnosing the Issue

Before replacing the module, it's wise to perform a few diagnostic checks:

1. Check the Fuses: The first and easiest step is to check the fuses related to the trunk and body control systems. On the Rapide S, a rear compartment fuse box that manages trunk functions is located under the rear passenger seat.
2. Listen for Clicks: Have someone press the trunk release while you stand near the back of the car. A clicking sound usually means the module and relay are trying to work, pointing the finger at a mechanical issue in the latch itself. No sound at all suggests an electrical problem, which could be the fuse, wiring, or the module.
3. Battery Health: General electrical issues on Aston Martins are sometimes linked to a weak battery. Ensure your battery is fully charged and in good health before assuming a module has failed.

CRITICAL: Programming and Installation Requirements

This is the most important consideration when replacing the Deck Lid Control Module on a Rapide or Vanquish. This part is NOT plug-and-play.

A replacement module, whether new or used, must be programmed to the vehicle to function. This process involves using the proprietary Aston Martin Diagnostic System (AMDS). This dealer-level software is required to initialize the new module and integrate it into the car's Central Electric Module (CEM) and Car Configuration File (CCF). Without this step, the vehicle will not recognize the new part, and it will not work.

• Dealer or Specialist Required: The AMDS system is tightly controlled by Aston Martin, meaning this job must be performed by an authorized dealer or a highly specialized independent shop that has invested in the official equipment.
• Not a DIY Job: Due to the software requirements, swapping this module is not a feasible DIY project for the average home mechanic. The physical replacement is simple, but the electronic integration is complex.

Buying a Used Deck Lid Control Module

Purchasing a used OEM module can offer significant cost savings, but you must proceed with caution. Given the programming requirements, the price of the part itself is only one part of the total cost.

What to Look For:

• Verify the Part Number: Match the OEM part number on your original module exactly. The primary numbers are CD33-26490-BB and CD33-26490-BC. The different suffixes often represent hardware or software revisions. While they may be interchangeable, matching the number is the safest approach.
• Inspect for Damage: Carefully examine photos of the used module. Look for any signs of corrosion on the pins or casing, which could indicate water damage—a known issue in the trunk area of some models. Avoid any units with physical damage to the housing or connectors.
• Buy from a Reputable Source: Purchase from an established auto recycler that offers a warranty and has good reviews. This provides some protection if you receive a dead-on-arrival part.

Known Issues, Recalls, and Technical Service Bulletins (TSBs)

There are no specific NHTSA recalls or widespread TSBs for the deck lid control module on the 2010-2018 Rapide or 2013-2018 Vanquish. However, general electronic faults are a commonly reported weak point on these vehicles, often stemming from wiring, connectors, or module communication errors.

Cost Comparison for Replacement

Prices can vary based on location and supplier. The most significant variable is the labor and programming cost, which requires specialized equipment.

Labor estimate is based on 2 hours at typical dealer ($295/hr) or independent specialist ($150-$200/hr) rates, which includes physical installation and AMDS programming.

Associated Part Numbers

Always verify the part number on your specific module before ordering a replacement. Known OEM part numbers include:

• CD33-26490-BB
• CD33-26490-BC

Frequently Asked Questions (FAQ)