BMW F30 F31 Rear Bumper Diffuser M Sport Trim Cover Single Exhaust Black 8054198

Visual condition of the part

The product shows signs of use visible in the photos. BMW F30 F31 Rear Bumper Diffuser M Sport Trim Cover Single Exhaust Black is a component from the Bumpers and reinforcements group, designed for the rear body section of BMW 3 Series F30/F31 models with the M Sport package and a single exhaust. The black, discreet design of the diffuser allows for an aesthetic finish to the bumper, improving the visual consistency of the vehicle's rear section and preparing it for the appropriate exhaust system configuration.

Specifications and technical data

• SKU: 8054198-5
• Mark: Unbranded
• Condition: Used
• OEM Part Number: 8054198
• Substitutable numbers: 8054198, 51128054198, 51 12 8 054 198
• Location on the vehicle: Rear
• Part type: Bumper
• Color: Black
• Category: Bumpers & Reinforcements

Purpose and function of the diffuser

The presented rear trim is designed for installation in the lower part of the bumper, in the exhaust area, for BMW F30/F31 cars with the M Sport package and a single exhaust tip. The component acts as a visual diffuser, streamlining the bumper line, masking the undercarriage area, and providing a properly shaped cutout for the exhaust tip. Thanks to its precise geometry, the diffuser allows for maintaining the factory character of the rear bodywork, which is essential both for post-accident repairs and for restoring the car to its original M Sport configuration. The black color facilitates integration with stock bumpers and other rear trim elements of the vehicle.

Construction, color, and body fitment

The diffuser is intended for installation in the rear body zone, replacing the factory bumper trim. The design accommodates a single exhaust, allowing for proper routing of the exhaust tip and maintaining adequate clearances between the body components and the exhaust. The black surface of the diffuser blends well with typical M Sport package styling configurations, both for dark and lighter body paint colors. This type of trim is particularly useful when you want to:

• achieve a cohesive, sporty look for the rear bumper,
• restore the original body line after damage,
• prepare the bumper for a single exhaust system in the M Sport version.

Installation characteristics and application

The diffuser is a body component from the Bumpers and reinforcements group, meaning it works in conjunction with the rear bumper structure, and its installation takes place in the lower part of this assembly. The solution is intended for users who want to maintain the factory styling solutions of the BMW F30/F31 M Sport with a single exhaust, without the need for non-factory modifications. As a used part, the diffuser provides a practical alternative for repairs and body component replacements, allowing for cost savings while maintaining proper fitment to the bumper and the rear zone of the vehicle.

Selecting the correct component by numbers and parameters

The product has a dedicated OEM part number and associated interchangeable numbers, which facilitates unambiguous identification in catalogs and parts selection systems. Combined with information about the vehicle placement and color, it is possible to precisely match the diffuser to a specific BMW F30/F31 configuration with the M Sport package and a single exhaust, without the risk of confusion with other bumper or trim variants.

Expanding rear body modernization

If you are planning a comprehensive repair or modernization of the rear bumper zone in your BMW and need other components from the same group, such as reinforcements, beams, or additional covers, check the available parts in the Bumpers and reinforcements Unbranded category. For drivers interested in a broader look at elements affecting vehicle handling and the interaction between the body and the chassis, the article explaining the operation of the steering system, power steering, and examples of using used parts may be helpful – you can find it here: Steering system and power steering – how it works and what fails?.