Bumper Rear Diffuser BMW E90 E91 M Sport Bottom Trim Panel Insert Gloss Black

Visual condition of the part

The product shows signs of use visible in the photos.

Bumper Rear Diffuser BMW E90 E91 M Sport Bottom Trim Panel Insert Gloss Black is a body component designed for a precise fit with the factory M Sport bumper. This bottom insert provides an aesthetic finish to the rear of the vehicle while enhancing the stylistic consistency and aerodynamic character of the car. Thanks to its gloss black finish, it blends perfectly with the body lines, emphasizing the sporty look of the BMW 3 Series E90/E91.

Specifications and technical data

• SKU: 8043239-2
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8043239
• Substitutable numbers: 51128043239, 8043239, 51128044637, 8044637
• Location on the vehicle: Rear
• Color: Black
• Category: Bumper Inserts & Covers

Purpose and function of the component

The presented diffuser is a rear bumper bottom insert designed for installation in the rear area of BMW 3 Series E90 and E91 models with the M Sport package. As a component from the Bumper inserts and covers category, it is responsible for the aesthetic closure of the lower part of the bumper, as well as for streamlining airflow under the car. Installing the correct diffuser helps reduce unwanted air turbulence and improves the visual proportions of the rear bodywork.

Appearance and fit for BMW E90/E91 M Sport

The high-gloss black finish gives the rear of the car a distinctly sporty character that harmonizes well with the M Sport bumper line. The component has been designed as part of the original BMW styling, ensuring it retains factory lines, contours, and surface divisions. The precise shape makes installation easy in the location intended by the manufacturer, without the need for modifications to the bumper structure.

Material, color, and utility values

The diffuser is made of material designed for outdoor use, resistant to typical operational stresses in the rear body area. The glossy black color allows for easy integration with both light and dark body paints, and if necessary, enables further customization (e.g., vinyl wrapping). As a used component, it retains the functionality and geometry necessary for proper installation, making it a reasonable choice for post-accident repairs or visual upgrades.

Installation and practical application

The diffuser is intended for installation in the rear of the vehicle, in the lower bumper zone. The design provided by the BMW manufacturer allows for installation in place of the factory insert, which facilitates work for body shops or service centers specializing in the brand. Using an original solution from the Bumper inserts and covers category helps restore the car's consistent appearance after repairs or perform an aesthetic upgrade while maintaining the factory M Sport character.

Benefits of choosing an original BMW component

By choosing this diffuser, you receive a component designed specifically for the BMW 3 Series E90/E91 with the M Sport package, which translates into proper fitment with other body components. The original geometry and surface line make it easier to achieve even gaps and an aesthetic transition between the bumper and the insert, which is particularly important for post-accident repairs and demanding detailing projects.

If you are planning a comprehensive repair or upgrade of the rear bumper area in your BMW and need other components from the same group, such as covers, inserts, or additional panels, check out the available parts in the BMW Bumper inserts and covers category.