2003-2014 Lamborghini Gallardo Deck Lid Molding: Cracks, Heat Damage, and Replacement

Symptoms of Deck Lid Molding Failure

Failures of the Gallardo's rear trim are almost always visual. Because the panel is located in a high-heat area, most symptoms are related to material degradation. Look for these common signs:

• Cracks and Brittleness: The most common failure is the development of hairline or significant cracks in the panel itself. The original plastic or fiberglass becomes extremely brittle from years of heat cycles.
• Warping or Buckling: Intense heat can cause the panel to warp, preventing it from sitting flush with the bodywork. It is very common to see some dimpling or buckling of the panel directly behind the Lamborghini script emblem.
• Broken Mounting Tabs: The plastic tabs used to secure the trim panels are a known weak point. They become brittle and can snap off from heat and engine vibration, causing the panel to become loose or rattle. This is especially common on the internal engine bay plastics.
• Cosmetic Finish Damage: The panel's paint or clear coat can fade, peel, or become hazy due to a combination of heat and UV sun exposure.

Vehicle-Specific Known Issues & Generation Differences

While all 2003-2014 Gallardos are susceptible to heat damage on their rear trim, there are important differences between the early models and the later facelifted versions.

Pre-LP Models (2004-2008)

The first-generation cars, often called "pre-LP" models, are notorious for issues with brittle plastics. The OE plastic used for the engine bay covers and rear bumper support structure degrades horribly with time and heat. A major design flaw on these models involves the rear bumper's inner support skeleton, which holds the mesh grilles in place. The tabs on this support become brittle and break, which can cause the expensive rear grilles to become loose or fall out completely. On pre-LP cars, this support structure is integrated with the bumper, meaning a complete, expensive bumper replacement is the official factory solution.

LP Models (2009-2014)

For the updated LP550, LP560, and LP570 models, Lamborghini improved the design. The problematic rear bumper support was made a separate, replaceable part, so you no longer need to replace the entire bumper if the grille tabs break. While the materials were improved, these models are still prone to heat damage on the deck lid and engine bay panels, though often to a lesser extent than the earlier cars. Aftermarket carbon fiber engine bay panel kits are much more widely available for the LP models.

Buying a Used Deck Lid Molding

A used OEM molding is often a cost-effective solution for a cracked or damaged panel. Due to the known issues with heat, careful inspection is critical before buying.

• Check for Hairline Cracks: Thoroughly inspect the entire surface, especially around the mounting holes and edges, for any small cracks. What looks like a scratch could be a crack that will grow once exposed to engine heat.
• Verify All Mounting Tabs: Flip the panel over and confirm every mounting tab is present and intact. A used panel with broken tabs is no better than the one you are replacing.
• Test for Warping: Lay the molding on a perfectly flat surface to check for any warping or twisting. A warped panel will not sit flush on the car and will create unsightly gaps.
• Assess the Finish: Look at the paint and clear coat. Minor swirls can be polished, but peeling clear coat or deeply faded paint will require a full respray, adding to your cost.
• Confirm Part Numbers: For the main rear upper panel, the OEM part number is typically 400864487. Always match part numbers to ensure you are buying the correct piece for your vehicle.

Replacement Overview

Replacing the rear deck lid molding is a straightforward job suitable for a DIY mechanic with basic tools. The process generally involves removing the engine bay liner panels to access the bolts securing the molding from underneath.

1. Open the engine cover.
2. Remove the cosmetic liner panels from the inside of the engine bay to expose the underside of the deck lid. These are typically held by a few small bolts or clips.
3. Locate the bolts that hold the deck lid molding in place. There are usually a handful of them accessible from the underside.
4. Carefully remove the bolts and lift the old molding off the car.
5. Clean the mounting surface on the engine cover.
6. Position the new molding and loosely install all bolts by hand.
7. Gently tighten the bolts evenly to secure the new panel. Do not overtighten, as this can crack the new part.
8. Reinstall the engine bay liner panels.

Cost Comparison

Prices for Lamborghini parts can be very high, making used OEM a popular choice.

Related Vehicle Recalls (Not Part-Specific)

While there are no recalls for the deck lid molding itself, several important safety recalls have been issued for the 2003-2014 Gallardo that owners should be aware of.

• NHTSA Recall 12V430000: Affects 2004-2006 Gallardo Coupe and Spyder models. High-pressure power steering hoses may leak, and if the fluid contacts an ignition source, it could cause a fire. Dealers will update the power steering system free of charge.
• NHTSA Recall 18V833000: Affects 2011-2014 Gallardo Coupe and Spyder models. The Engine Control Unit (ECU) software may fail to store trouble codes, preventing the check engine light from illuminating for certain problems. This could increase the risk of a crash if a safety system issue goes unnoticed. Dealers will reflash the ECU software.

Frequently Asked Questions (FAQ)