BMW 3 E90 E91 M Sport Diesel Engine Underbonnet Tray Shield Protection Screen

BMW 3 E90 E91 M Sport Diesel Engine Underbonnet Tray Shield Protection Screen is a component designed for the front section of the vehicle body, specifically engineered for diesel engine models. It is responsible for protecting the lower area of the engine bay and improving the acoustics of the powertrain, which translates into a more comfortable and orderly operation. Thanks to its fitment for the M Sport version, it ensures proper airflow and consistency with the factory aerodynamics.

Specifications and technical data

• SKU: 8040113
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8040113
• Substitutable numbers: 51758040113, 8040113, 51758040107, 8040107
• Location on the vehicle: Front
• Fuel type: Diesel
• Category: Splash Guards & Mud Flaps

Purpose and function of the engine under-tray

The M Sport engine under-tray serves several key roles in the daily operation of a BMW 3 Series E90/E91 with a diesel engine. It protects the lower parts of the powertrain from dirt, water, and minor mechanical damage, while simultaneously reducing noise penetration into the cabin. Proper soundproofing promotes quieter powertrain operation and more stable thermal conditions within the engine bay.

Due to its design tailored to the front of the vehicle, the shield works in conjunction with other body components, supporting airflow under the car. This is important both for cooling and for maintaining the factory driving characteristics typical of the M Sport version.

Compatibility with BMW E90/E91 diesel engines

The presented shield has been prepared for use in the front undercarriage area of BMW 3 Series E90 and E91 models equipped with diesel units. Using a solution that complies with factory specifications facilitates installation and allows for the retention of original mounting geometry, which is essential for proper alignment with other body components.

Being dedicated to the M Sport version means that the shape and lines of the shield are adapted to the sports styling package, ensuring the component does not disrupt the appearance or aerodynamics of the vehicle. This is a particularly beneficial solution for users who want to maintain the visual and technical integrity of the car after repairs or the replacement of damaged components.

Characteristics of the used component

This engine soundproofing shield comes from the secondary market, which allows for an economical restoration of protection for the lower part of the powertrain while maintaining compliance with the original BMW design. A used component is a good solution in situations where the existing shield has been mechanically damaged or removed, and the vehicle requires the restoration of its underbody completeness.

The use of an original shield in the front undercarriage zone helps maintain an appropriate level of soundproofing and limits the splashing of water and contaminants onto engine components, hoses, and accessories. This is especially important in cars with diesel engines, where stable operating conditions and the protection of sub-assemblies have a direct impact on operational durability.

Benefits of installing the soundproofing shield

The use of an engine under-tray in a BMW E90/E91 M Sport version provides a number of practical benefits, including:

• better protection of the lower engine area and accessories against dirt and minor road damage,
• reduction of noise coming from the engine bay into the vehicle interior,
• maintenance of orderly airflow under the car, beneficial for cooling and aerodynamics,
• preservation of structural and visual consistency with the M Sport package.

For users who value acoustic comfort, undercarriage aesthetics, and the protection of critical components, installing such a shield is a sensible and technically justified solution.

Expanding the protection zone – BMW Mud Flaps category

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other components from the same group, such as additional shields, protective panels, or elements protecting the lower part of the body, check out the available parts in the BMW Mud Flaps category.

Technical knowledge and modification inspiration

If you are interested in a broader context of modifying models with sports packages, including the selection of styling and functional elements, it is worth consulting expert materials. For example, issues related to equipment personalization and matching components to the M Sport version are discussed in more detail in the article Personalization and ergonomics – when is it worth replacing the steering wheel with a premium model?, which can serve as a starting point for further upgrades to your BMW.