Underfloor Cover BMW E90 LCI M Sport Diesel Engine Underbonnet Shield Protection

Visual condition of the part

The product shows signs of use visible in the photos.

Underfloor Cover BMW E90 LCI M Sport Diesel Engine Underbonnet Shield Protection is an original protective component designed for the front undercarriage of diesel engine versions. It provides stable coverage for critical powertrain components, improving aerodynamics and acoustic comfort. This is a practical solution for drivers who expect factory-fit quality and robust protection for the engine area.

Specifications and technical data

• SKU: 8047423
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8047423
• Substitutable numbers: 51718047423, 8047423, BG
• Location on the vehicle: Front
• Fuel type: Diesel
• Category: Other Exterior Parts & Accessories

Purpose and function of the engine shield

The presented engine shield has been designed for BMW 3 Series E90/E91 models equipped with the M Sport package and diesel engines. Its task is to limit direct contact between engine components and water, mud, and road debris, which helps maintain stable operating conditions for the sub-assemblies. Its placement in the front part of the vehicle allows for effective shielding of the lower engine area and improves airflow under the car.

Benefits of installation in a BMW with a diesel engine

In vehicles with diesel engines, it is particularly important to maintain proper operating temperatures and protect equipment from harsh operating conditions. Installing the M Sport diesel engine shield helps to:

• reduce the risk of dirt and corrosion of components in the front engine area,
• reduce the amount of water and road salt entering the engine bay from below,
• stabilize airflow under the vehicle, which promotes smoother operation of the drivetrain,
• reduce the noise level coming from the lower part of the engine into the cabin.

Installation characteristics and fitment

The shield has been prepared as a component dedicated to the front of the vehicle, which facilitates correct positioning relative to factory mounting points. This makes it possible to maintain proper clearances and compatibility with other M Sport package elements. The used nature of the part makes it a cost-effective solution while maintaining original geometry and fitment to the BMW chassis structure.

Condition and service application

The product comes from dismantling, which makes it a good choice for post-accident repairs, replacing a damaged shield, or restoring the completeness of the lower engine enclosure. Compared to aftermarket replacements, the original engine shield ensures consistency with the factory aerodynamic design and predictable behavior during operation. It is a practical solution for workshops and individual users who want to maintain structural consistency with the rest of the M Sport components.

Related categories and technical knowledge

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, engine plates, or lower enclosure elements, check out the available parts in the Other BMW category.

To expand your knowledge about the structural differences between sports and standard versions, including changes in the engine, brakes, and chassis, it is worth reading the article Audi RS vs other models – what is hidden under the hood and chassis?, which shows how manufacturers design more heavily loaded drivetrains and their shields.