Rear Bumper Diffuser BMW F10 F11 M Sport Bottom Trim Panel Cover Dark Shadow

Visual condition of the part 

The product shows signs of use visible in the photos. 

Rear Bumper Diffuser BMW F10 F11 M Sport Bottom Trim Panel Cover Dark Shadow is an original body component from the Bumpers and reinforcements category, designed for installation in the rear section of the vehicle. Engineered for the M Sport package, the diffuser helps maintain a consistent, dynamic body appearance and proper airflow management behind the car. It is a practical solution for users who want to restore the factory look of the rear bumper or perform an aesthetic upgrade.

Specifications and technical data

• SKU: 7904994
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7904994
• Substitutable numbers: 7904994, 51127904994
• Location on the vehicle: Rear
• Category: Bumpers & Reinforcements

Purpose and function of the diffuser

The rear bumper diffuser cover is dedicated to BMW 5 Series F10/F11 models equipped with the M Sport package, where it is responsible for the aesthetic finish of the lower bumper section and optimizing airflow in the rear area of the body. Its placement in the Rear of the vehicle makes this component both visually and functionally significant – it covers the lower part of the bumper and serves as a base for further styling modifications.

Technical characteristics and fitment

The diffuser is manufactured to match the factory geometry of the M Sport bumper, which facilitates installation at the original mounting points. The design is intended for use with the stock bumper, without the need for any modifications to the body structure. This ensures proper alignment of the bumper lines and maintains the appropriate rigidity of the entire rear assembly.

The Dark Shadow finish gives the rear of the car a subtle, sporty character that complements the body lines of the BMW F10/F11. This component allows for an economical replacement of a damaged diffuser while maintaining the original M Sport styling.

Application in service and tuning practice

The M Sport rear bumper diffuser cover is suitable for both post-accident repairs and visual upgrades using original BMW components. The product is particularly useful when:

• it is necessary to replace a damaged or missing diffuser in the rear bumper section,
• you are planning to retrofit the car with the M Sport package while maintaining a factory look,
• you want to maintain stylistic consistency of the rear body section with other package elements.

By maintaining the original form and purpose, the diffuser allows for service in accordance with the manufacturer's specifications, without compromising on fitment or body lines.

Benefits of choosing an original diffuser cover

By choosing this component, you gain, above all, factory fitment for the M Sport bumper, which translates into predictable installation and no issues with the geometry of the rear body section. The OEM component is also a reasonable compromise between repair costs and maintaining the original look of the BMW F10/F11.

The element from the Bumpers and reinforcements group is not only visually important – a properly selected diffuser helps maintain the correct structure of the rear bumper, which is essential for further bodywork and paint jobs as well as any potential future repairs.

Fitment by part numbers and additional materials

Before purchasing, it is worth verifying the compatibility of the diffuser with the specific equipment version of your BMW using the OEM part number and available replacement numbers. This helps avoid installation issues and ensures full compatibility with the rear bumper.

If you want to deepen your knowledge on the safe selection of body parts and other components by part numbers, you will find practical tips in the article: Online parts shopping without risk – 5 proven ways to verify component compatibility.

If you are planning a comprehensive repair or upgrade of the rear bumper zone in your BMW and need other elements from the same group, such as reinforcements, beams, or additional covers, check out the available parts in the BMW Bumpers and reinforcements category.