BMW 1 3 Series E90 F20 Door Handle Cap Cover Rear Left N/S Mineralgrau Grey B39

The BMW 1 3 Series E90 F20 Door Handle Cap Cover Rear Left N/S Mineralgrau Grey B39 in Mineral Grau Metallic B39 is an original body component from the Doors and door panels category, designed for installation on the rear left side of the vehicle. This practical solution allows you to restore the consistent appearance of the side body section after damage or loss of the factory door handle cover.

Specifications and technical data

• SKU: P0399177-MG
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 0399177
• Substitutable numbers: 51210399177, 0399177, 51210399175, 0399175, EM
• Location on the vehicle: Rear, Left
• Color: Mineral Grau Metallic - B39
• Category: Doors & Door Skins

Purpose and fitment

The presented door handle cap is designed specifically for BMW 1 Series and 3 Series models, including the E90 and F20 generations, for placement on the rear left side of the body. Thanks to the factory mounting geometry and the correct surface profile, the component ensures proper fitment with the door handle and door panel without the need for modifications or forced adjustments.

Its original BMW origin ensures the maintenance of correct assembly gaps, compatibility with the door crease lines, and stable seating in the socket, which is important for both aesthetics and the durability of the connection.

Color and surface finish

The component is finished in the factory color Mineral Grau Metallic – B39, characteristic of many BMW paint configurations. The metallic coating ensures consistency with the original body paint, reducing the need for additional painting when replacing a damaged cap with a unit in the same color code.

The uniform paint structure on the surface of the cap allows for maintaining an aesthetic appearance of the door handle area, which is particularly important in the side profile of the vehicle, where any shade differences are easily noticeable.

Functional characteristics

The rear left door handle cap serves both protective and aesthetic functions: it shields the door handle mechanism from direct exposure to external factors and visually completes the door line. A correctly selected component:

• limits the ingress of dirt and moisture into the door handle mechanism area,
• prevents the formation of unsightly gaps within the door panel,
• maintains a consistent appearance of the side body section.

The product comes from dismantling, which allows for an economical replacement of the component while maintaining the original BMW specification, without the need to resort to aftermarket parts with uncertain fitment.

Installation and service application

The cap is intended for installation in the factory location, using the original mounting points in the door. In practice, this means the replacement can be carried out in a workshop environment or by an experienced user without interfering with the door structure. Replacing a damaged or missing cover is often one of the final stages of bodywork and paint repairs after fixing the side section of the vehicle.

Due to the dedicated placement on the vehicle (rear, left side), it is worth selecting the component precisely according to the body version and mounting side to avoid fitment issues and unnatural gaps between the handle and the door panel.

Offer expansion and technical knowledge

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

For users interested in a broader technical context of BMW vehicles and other all-wheel-drive brands, an article comparing AWD solutions may be helpful – you can find it here: xDrive, 4Matic, quattro or 4Motion – a comparison of AWD systems.