BMW E87 Cover Window Frame Door Front Right O/S HiFi Tweeter Trim 7121146

BMW E87 Cover Window Frame Door Front Right O/S HiFi Tweeter Trim is an original body component from the Doors and door panels group, designed for installation on the front right side. It ensures proper finishing of the door window frame, stabilizes the seal, and helps maintain the correct body line, which translates into the aesthetics and comfort of your BMW 1 Series E87.

Specifications and technical data

• SKU: 7121146
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7121146
• Substitutable numbers: 51337121146, 7121146, 51337258574, 7258574, 51337121148, 7121148, 51337258572, 7258572, 51337121150, 7121150
• Location on the vehicle: Front, Right
• Category: Doors & Door Skins

Purpose and function of the window frame cover

The described cover is a component mounted in the front right door, in the window frame area. It is responsible for:

• stable guidance and support of the window seal,
• protecting the edge of the door sheet metal from mechanical damage,
• limiting the ingress of water and contaminants into the door interior,
• maintaining the correct geometry of the window frame during the operation of the lifting mechanism.

Thanks to its fitment for the specific BMW E87 model, the component works with factory windows, guides, and seals, which facilitates installation and reduces the risk of improper fitment.

Advantages of using an original BMW part

The front right door window frame cover, originating from the BMW line, has been designed to maintain factory body parameters. Using an original component means:

• secure fitment to the door structure without the need for modifications,
• compatibility with factory mounting points and the shape of the window frame,
• consistent appearance with other door trim elements,
• easier diagnostics and service in the future thanks to clear assignment to a specific parts group.

This solution is particularly recommended for post-accident repairs, replacing corroded or damaged elements, and restoring the bodywork to a condition close to factory specifications.

Installation and operational characteristics

The cover is designed for installation in the front right part of the body, within the door area. The design tailored to the BMW 1 Series E87 allows for:

• precise positioning relative to the door edge and window,
• cooperation with factory seals and the window lifting mechanism,
• maintaining even gaps between the window and the door frame.

A properly selected window frame cover helps reduce cabin noise, minimizes window vibrations, and supports sealing in the area where the window meets the door, which is important for both driving comfort and protecting the interior from moisture.

Product condition and practical application

The item is offered as a used part, which allows for economical repair while maintaining original BMW specifications. This is a good solution in situations where:

• the window frame has been damaged as a result of a collision or vandalism,
• it is necessary to replace the element after body and paint work,
• leaks or problems with window guidance occur on the passenger side.

Using an original cover from the same model group makes it easier to restore the proper operation of the window mechanism and the aesthetic appearance of the door.

Complementary BMW E87 body components

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

For larger body repairs or when purchasing other used mechanical components, it is worth expanding your knowledge on verifying the technical condition of parts – a practical guide may be helpful: How to buy a used car engine and avoid a bad deal – a step-by-step guide.