2014-2020 BMW i8 Trunk Trim Panel: Coupe vs. Roadster Fitment and Damage Guide

Symptoms of a Bad Trunk Trim Panel

Since this is a cosmetic part, failure symptoms are almost always visible or audible. The most common reasons for replacement are damage from use, broken mounting points, or issues related to other trunk problems.

• Rattling or Buzzing Noises: The most common issue is rattling from the rear of the car. This is usually caused by broken or loose plastic mounting clips on the back of the panel, allowing it to vibrate against the car's body.
• Visible Damage: Scuffs, deep scratches, and gouges are common from loading and unloading heavy or sharp-edged cargo. The carpeted surface can also be torn or stained from spills.
• Loose or Sagging Fit: If the panel doesn't sit flush with the surrounding trunk area, it's a sign that multiple clips are broken or the panel itself has been warped or damaged.
• Water Stains or Mold: While not a failure of the panel itself, stains or a musty smell indicate a water leak, likely from a bad trunk lid seal. The panel will need to be removed to diagnose the leak, and often replaced if it has been damaged by moisture.

Buying a Used Trunk Trim Panel

Buying a used OEM trunk trim panel is a smart way to save money, especially since this is a cosmetic part. However, you need to inspect it carefully to ensure you're getting a good part.

What to Check Before You Buy:

• All Mounting Clips and Tabs: This is the most critical inspection point. Flip the panel over and carefully check every plastic clip and the molded tabs they attach to. Look for any that are broken, missing, or show white stress marks, which indicate they are close to breaking. A panel with even one or two broken clips may not fit securely and could cause rattles.
• Physical Condition: Inspect the carpeted surface for major stains, tears, or excessive wear. Check the underlying structure for any cracks, especially around the edges and corners. Minor scuffs may be acceptable, but deep gouges cannot be repaired.
• Signs of Water Damage: Look for discolored water lines, chalky residue, or feel for any areas that are stiff or brittle. A musty or moldy smell is a major red flag. A water-damaged panel should be avoided, as it may also bring mold spores into your car.
• Confirm the Part Number: Whenever possible, match the OEM part number. The primary numbers are 51477316269 and the shortened version 7316269. This ensures you are getting the exact part for your vehicle.

Known Issues, TSBs, and Recalls

There are no recalls or Technical Service Bulletins (TSBs) issued specifically for the trunk trim panel itself. However, owners have reported several related issues with the i8's trunk mechanism that can lead to a need to remove or replace the panel.

• Trunk Lid Fails to Open: Some owners report the trunk failing to unlatch, sometimes trapping items inside. This is often caused by a malfunctioning latch or a problem with the emergency interior release handle getting snagged. In some cases, a technician may need to remove the rear bumper to access the manual release, a process that could potentially damage the trim panel if not done carefully.
• Trunk Lid Spring Plunger Failure: A known issue involves a small plastic plunger and spring assembly that helps the trunk lid pop up when unlatched. This plastic part can crack over time, causing the pop-up feature to fail. While this part is separate from the main trim panel, accessing and replacing it is easier with the trim removed.
• Unintentional Opening: TSB #B513016 addresses the tailgate unintentionally opening, sometimes while the vehicle is in motion. This is an issue with the locking mechanism, not the trim panel.

Cost of Replacement

Prices can vary based on condition and supplier. As of late 2023, expect to find pricing in these ranges:

Frequently Asked Questions (FAQ)