BMW F90 M5 Underbody Panelling Trim Panel Cover Rear Right O/S 8070398

Visual condition of the part

The product shows signs of use visible in the photos.

BMW F90 M5 Underbody Panelling Trim Panel Cover Rear Right O/S is an original body component from the Mudflaps group, designed for installation on the rear right side of the vehicle. This black floor panel helps streamline airflow under the car, reduces dirt accumulation, and protects critical areas of the undercarriage, which is essential for both the durability and handling stability of the BMW M5 F90 sports sedan.

Specifications and technical data

• SKU: 8070398
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8070398
• Substitutable numbers: 8070398, 51758070398, KD
• Location on the vehicle: Rear, Right
• Color: Black
• Category: Splash Guards & Mud Flaps

Purpose and function of the component

The presented cover is tailored to the rear right section of the BMW 5 Series M5 F90 undercarriage. Its purpose is to:

• protect the lower body parts from water, mud, and small road debris,
• reduce direct contact of structural components with salt and moisture,
• streamline airflow under the car, which promotes stability at higher speeds,
• aesthetically enclose the lower part of the body on the rear right axle side.

Thanks to its precise fit for the specific M5 F90 model, the panel works with factory mounting points, facilitating installation and maintenance.

Construction and fitment for the BMW M5 F90

The cover is finished in black, allowing for a consistent visual integration with other undercarriage and wheel arch components. The panel's design is optimized for:

• compatibility with factory brackets and the floor shape in the rear section of the vehicle,
• proper airflow management in the rear axle area,
• maintaining ground clearance and avoiding interference with suspension and exhaust system components.

The part comes from the BMW line, which ensures the maintenance of proper geometry and compatibility with the M5 F90 body without the need for modifications.

Condition, service application, and installation

This is a used part, intended primarily as a replacement for a damaged or missing cover in the rear right undercarriage zone. It is suitable for situations where:

• the existing panel has been mechanically damaged (e.g., due to hitting an obstacle),
• the factory cover is missing after body and paint repairs,
• it is necessary to restore the completeness of the lower body structure.

Installation takes place in the factory location, using the mounting points provided by the manufacturer. This makes service work predictable and minimizes the risk of improper fitment.

Benefits of using an original underbody cover

Using a dedicated underbody cover in the BMW M5 F90 provides a number of practical benefits:

• Better undercarriage protection – limiting the direct impact of external factors on structural and mechanical components in the rear of the car.
• More stable airflow – organizing the undercarriage aerodynamics in the rear axle area, which is significant in a high-performance vehicle.
• Structural consistency – maintaining the completeness of the lower body structure in accordance with BMW engineers' specifications.
• Service aesthetics – eliminating "open" floor sections visible from underneath the vehicle after repairs.

Expanding BMW body protection

If you are planning a comprehensive repair or upgrade of the wheel arch and undercarriage area in your BMW and need other parts from the same group, such as additional covers, panels, or mudflaps, check out the available parts in the BMW Mudflaps category.

For major body and undercarriage service work, it is also worth taking care of the condition of the powertrain; in this context, a guide on verifying power units may be helpful: Buying a used engine: 5 things you must check before installation.