BMW G20 G21 Side Skirt Left N/S M Sport Sill Strip Cover Trim Alpinweiss 3 - 300

Visual condition of the part

Possible scratches and paint chips – condition as shown in the product photos.

BMW G20 G21 Side Skirt Left N/S M Sport Sill Strip Cover Trim Alpinweiss 3 - 300 is an original body component designed for installation on the left side of 3 Series G20/G21 models. Finished in Alpinweiss 3 - 300, this side skirt maintains the consistent look of the factory M Sport package while restoring the aesthetics and functionality of the sill area. It is a practical solution for users looking to technically restore the side profile of the vehicle body.

Specifications and technical data

• SKU: 8099909-AW
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8099909
• Substitutable numbers: 8099909, 51778099909
• Location on the vehicle: Left
• Color: Alpinweiss 3 - 300
• Category: Running Boards & Side Bars

Purpose and fitment

The presented side skirt has been designed specifically for the BMW 3 Series G20/G21 generation body in the M Sport version. Its placement on the left side of the vehicle ensures proper fitment to factory mounting points and correct alignment of the sill line relative to the doors and fender. As a result, the component integrates with other aerodynamic package parts without the need for modifications.

Visual characteristics and color

The Alpinweiss 3 - 300 color is one of BMW's signature paints, frequently chosen in combination with the M Sport package. Using a side skirt in this shade allows for a uniform side surface, without tonal differences between the sill and the rest of the body. This is particularly important for post-accident repairs or replacing individual components, where visual consistency and maintaining the car's original character are essential.

Protective and functional role

The side skirt serves not only an aesthetic role but also a practical one. It protects the lower part of the body from typical operational damage, such as minor stone chips or debris thrown from under the wheels. In the case of the M Sport version, this element also contributes to the aerodynamic profile of the vehicle's side, helping to streamline airflow in the sill area.

Condition and benefits of using a used part

The offered side skirt is a used component, which allows for a reasonable repair cost while maintaining original BMW specifications. Choosing parts from dismantling is a solution often used in professional workshops when the priority is compliance with factory standards and fitment for a specific equipment version, such as the M Sport package.

Use in repairs and upgrades

The component is suitable both for standard replacement of a damaged side skirt and for completing an M Sport package on cars that were not factory-equipped with it. In both cases, it is crucial to correctly select the mounting side and color to achieve a consistent final effect and maintain the characteristic side line of the BMW G20/G21.

If you are planning a comprehensive repair or upgrade of the sill area in your BMW and need other elements from the same group, such as covers, trims, or additional strips, check the available parts in the BMW side skirts category.

If you are considering a wider use of dismantled parts in your car and want to better understand their advantages in terms of maintenance costs, it is worth reading the article Smart Skoda servicing – why second-hand parts are the best choice for your wallet, which discusses the practical aspects of using used OEM components.