2004-2014 Gallardo Frame Support Brace 407813087: Solving Rear End Noises and Panel Gaps
This guide clarifies the function of the often misidentified rear frame support brace (OEM #407813087) for the 2004-2014 Lamborghini Gallardo, covering inspection, damage symptoms, and replacement.
- This part (OEM #407813087) is a structural frame brace, NOT a transmission mount; it does not fix drivetrain vibrations.
- Failure is almost always due to collision damage, not wear and tear. Check for bends and cracks.
- The most critical step when buying used is verifying if you need the Left Hand (LH) or Right Hand (RH) side, as they are likely not interchangeable.
- A used OEM brace is a cost-effective alternative to a new part, which can cost over $600.
What is This Part and Why is it Confusing?
The Lamborghini part number 407813087 (often superseded by 407813087A) is frequently misidentified in catalogs as a transmission mount or crossmember. However, it is a static, structural support brace for the rear frame. It's a solid metal bracket with no rubber or hydraulic components designed for vibration damping. Its purpose is purely structural: to tie parts of the chassis together for strength. This confusion often arises because of its location near drivetrain components. This article focuses on the correct identification and purpose of this frame brace.
Warning: There is significant confusion regarding the side fitment of this part. Some used listings specify it as 'LH' (Left Hand), while parts diagrams are not always clear if a separate right-hand part exists. Always visually match a used part to the one on your vehicle before purchasing to ensure you are buying the correct side.
Symptoms of a Damaged Frame Support Brace
As a solid metal bracket, this part does not wear out like a rubber mount. Failure is almost always caused by a collision, improper lifting of the vehicle, or extreme stress. Symptoms are typically visual or related to chassis alignment, not performance.
- Poor Body Panel Alignment: If the brace is bent or damaged, you may notice uneven gaps around the rear bumper or adjacent body panels.
- Unusual Noises from the Rear: A cracked or broken brace can cause creaking, popping, or rattling noises as the chassis flexes during driving, especially over bumps or during cornering.
- Visible Damage: The most obvious sign is visible damage to the part itself. This can include cracks (especially around bolt holes), bends, or significant corrosion. This should be checked after any rear-end impact, no matter how minor.
This part will NOT cause symptoms associated with failing engine or transmission mounts, such as:
- Vibrations at idle or under acceleration.
- Clunking noises when shifting gears.
If you are experiencing those symptoms, you should inspect the actual engine and transmission mounts, which are separate parts.
Buying a Used Frame Support Brace: What to Check
Because a new OEM brace can be very expensive, a used OEM part from a reputable recycler is a smart choice, provided you inspect it carefully. Since this is a simple structural component, a good used one is functionally identical to a new one.
- Check for Bends or Warping: Lay the brace on a flat surface. It should sit perfectly flat without rocking. Any warping indicates it has been compromised in an impact and should be rejected.
- Inspect for Cracks: Pay close attention to the areas around the mounting holes and any welded joints. Hairline cracks can grow under stress, leading to failure.
- Verify the Correct Side (LH vs. RH): This is the most critical step. Compare photos from the seller directly against the part on your car or the damaged part you are replacing. Do not rely on descriptions alone.
- Confirm the Part Number: Ensure the part is 407813087 or the updated 407813087A. While other frame components may look similar, only the correct part will fit properly.
Pro Tip: When replacing this brace due to a collision, it is wise to have a body shop check the chassis alignment. A bent brace can be a sign of more extensive, hidden frame damage.
Cost & Replacement Info
Replacement involves unbolting the old brace and installing the new one. However, access may require removing the rear bumper, 🎬 See this step-by-step guide on how to remove the rear bumper. undertray, or exhaust components, making it a moderately difficult job.
| Item | Estimated Cost |
|---|---|
| New OEM Part | $480 - $620 |
| Used OEM Part | $100 - $200 |
| Shop Labor Cost | $300 - $600 |
Frequently Asked Questions (FAQ)
Is part 407813087 a transmission mount?
No. Despite some catalog errors, it is a rigid, structural frame support brace. It does not contain rubber or other materials to dampen vibration.
Can I drive with a damaged frame brace?
It is not recommended. A damaged brace compromises the structural integrity of the rear of the vehicle, which can affect handling and safety, especially in the event of another impact.
Why would this part need to be replaced?
The most common reason for replacement is damage from a rear-end collision. 🎬 Watch this video of a crashed Gallardo rebuild to see rear frame damage. It can also be damaged from hitting road debris or from a vehicle being lifted incorrectly.
Is this the same part for the left and right sides?
This is unclear from most supplier data, but at least one source lists part 407813087 specifically as the 'LH' (Left Hand) side. It is safest to assume they are not interchangeable. Always verify the specific side you need before ordering.
Helpful Videos
Technical Specifications
OEM Part Numbers: 407813087 407813087A
Material: Metal Alloy. Function: Static structural support brace for the rear frame.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
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