BMW M5 G90 G99 Carbon Battery Terminal Cover

The Dry Carbon Battery Terminal Cover for the BMW M5 G90  and G99 is a precision-engineered aesthetic upgrade designed to replace the utilitarian factory plastic trim in the engine bay.

Because these covers sit directly atop the high-heat areas of the S68 engine bay, they are manufactured using "dry" carbon fiber (pre-preg) technology to ensure they maintain their structural integrity and finish over time.

Detailed Product Specifications

• Construction Process: Manufactured using Pre-Preg (Pre-impregnated) carbon fiber. The raw material is cured inside an autoclave (a high-pressure, high-heat oven). This process eliminates the "wet" resin weight and air pockets common in cheaper manufacturing, resulting in a part that is significantly lighter and more rigid.

• Material Integrity: High-tensile strength 3K carbon fiber fabric is used to create a consistent 2×2 twill weave, which is the industry standard for matching existing BMW M Performance carbon interior and exterior components.

• Finish: Finished with a deep, high-gloss UV-resistant clear coat. This coating serves two purposes: it provides a "wet-look" depth to the carbon weave and acts as a heat shield to prevent the carbon from yellowing or delaminating under the extreme temperatures of the M5’s hybrid powertrain.

• Fitment: These are designed as direct replacement or precise-snap-on units. They utilize the same mounting tabs and clips as the OEM plastic covers, ensuring a "plug-and-play" installation that requires no cutting, drilling, or permanent vehicle modifications.

Why It’s a Popular Upgrade

For the G90/G99 M5, the engine bay is often criticized for having a surplus of "cheap-looking" plastic shrouds. This cover specifically addresses the battery terminal/ECU area—a high-visibility zone when the hood is popped.

• Heat Stability: Unlike standard plastic or lower-grade "wet" carbon (fiberglass-backed), dry carbon will not warp or lose its shape, even with the intense thermal cycles of the S68 twin-turbo V8.

• Weight Reduction: While the primary goal here is aesthetic, the transition from heavy plastic to ultra-lightweight carbon aligns with the "race-inspired" engineering philosophy of the M division.

• Visual Continuity: The 2×2 weave creates a uniform appearance that bridges the gap between the engine bay and other carbon fiber options (such as front lips, spoilers, or interior trim).

Installation & Compatibility

• Compatibility: Fully compatible with both the G90 Sedan and G99 Touring (Wagon) variants equipped with the S68 engine.

• Installation: Generally takes 5–15 minutes. It typically involves unsnapping the factory plastic clips or pull-tabs and pressing the carbon cover into the existing factory mounting points.

• Note on LHD vs RHD: If you are sourcing this for a Right-Hand Drive (RHD) vehicle (e.g., UK, Australia, Japan), ensure the product is verified for RHD layouts, as the ECU and battery terminal positions on the cowl/firewall may be mirrored compared to US/European (LHD) models.