BMW 3 Series E90 E90 LCI E91 Seal Inner Cover Mirror Wing Triangle Right O/S

BMW 3 Series E90 E90 LCI E91 Seal Inner Cover Mirror Wing Triangle Right O/S is a precision mounting component designed for the right side of the vehicle body, responsible for the stable seating of the mirror and proper sealing of the door pillar area. Thanks to the use of a specially shaped foam and a triangular base, it provides reliable structural support and reduces the transmission of vibrations into the vehicle interior. This is a practical solution for users who want to restore the factory fit of the mirror and maintain cabin acoustic comfort.

Specifications and technical data

• SKU: 7120660
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7120660
• Substitutable numbers: 51337120660, 7120660
• Location on the vehicle: Right
• Category: Window Seals, Gaskets & Trims

Purpose and function of the component

The described mounting with a triangular foam is dedicated to the right-hand mirror in BMW 3 Series E90 models. Its task is to stabilize the mirror housing against the door and seal the contact point between the mirror base and the door panel, which helps reduce wind noise and unwanted vibrations when driving at higher speeds. Its placement on the right side of the vehicle means the component operates in a critical area exposed to wind gusts and vibrations, which is why the proper geometry and flexibility of the foam are essential for user comfort.

Construction and technical properties

The mounting utilizes a triangular support plate and a fitted foam that acts as a spacer and damper. This configuration:

• improves the fit of the mirror to the door surface,
• reduces the transmission of vibrations from the body to the mirror housing,
• supports the maintenance of a seal around the window and door pillar.

As a result, the mirror maintains a stable position, and the door structure handles operational loads more effectively. The component belongs to the Window seals and moldings group, which highlights its role in shaping the sealing and acoustics in the side area of the body.

Application in service practice

BMW 3 Series E90 E90 LCI E91 Seal Inner Cover Mirror Wing Triangle Right O/S is suitable both for typical replacement of a damaged mirror and for work related to improving door fitment or reducing cabin noise. Replacing this component is particularly justified when:

• the mirror shows excessive play or vibrations while driving,
• wind noise appears in the area of the right door pillar,
• after previous bodywork repairs, it is necessary to restore the factory mounting layout.

A properly selected mounting with foam allows for restoring predictable mirror behavior and improving the overall perceived quality of the passenger door.

Benefits of using an original BMW solution

Using a component consistent with BMW factory solutions promotes the maintenance of proper mirror mounting geometry and compatibility with other door components. Thanks to this:

• you achieve a predictable fit relative to the glass and door panel,
• you minimize the risk of rattles and resonances in the mirror area,
• you maintain the structural integrity of the door zone, which is important for future service work.

This solution is particularly beneficial for users who expect a solid, technically correct installation without experimenting with replacements of uncertain fitment.

Expansion and modernization of the BMW sealing zone

If you are planning a comprehensive repair or modernization of the door and window zone in your BMW and need other elements from the same group, such as additional window seals, window frame trim strips, or flexible spacer inserts, check the available parts in the BMW window seals and moldings category.

Support for modifications and tuning

For those who treat the replacement of door components as a stage of broader vehicle modifications, practical tips regarding the safe use of aftermarket components may be useful. In such a case, it is worth checking out the guide Tuning with used parts – how to gain performance without spending a fortune, which discusses how to consciously choose used components to maintain an appropriate level of reliability and functionality.