BMW 7 Series E65 E66 Seal Outer Mirror Triangle Left N/S 7018901

BMW 7 Series E65 E66 Seal Outer Mirror Triangle Left N/S is a precisely fitted component from the Window seals and trims category, designed for installation on the left side of the vehicle body. Thanks to the use of sealing foam, it improves acoustic insulation and limits moisture penetration around the mirror, which promotes stable mechanism operation and an aesthetic appearance of the door.

Specifications and technical data

• SKU: 7018901
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7018901
• Substitutable numbers: 51337018901, 7018901
• Location on the vehicle: Left
• Category: Window Seals, Gaskets & Trims

Purpose and function of the mirror foam seal

The left-side mirror foam seal in BMW E65/E66 series models is responsible for a tight connection between the mirror base and the door panel. It limits air drafts, reduces noise at higher speeds, and helps protect against water ingress around the mirror mounting area. A properly selected seal also supports mirror stability, reducing the risk of unwanted vibrations.

Compatibility and fitment for BMW E65/E66

The presented seal has been designed specifically for the door and mirror construction of the BMW E65 and E66, taking into account the characteristic geometry of the left-side mounting. The appropriate shape of the foam allows for proper adhesion to the surface, which facilitates installation and ensures a consistent sealing effect. Using a dedicated component instead of universal solutions helps maintain the factory standard of fit and appearance.

Characteristics of the foam material

The foam structure of the seal provides the flexibility needed to compensate for minor deformations of the sheet metal and mirror base, while simultaneously creating a barrier against moisture and contaminants. This type of material works well with both painted and plastic surfaces, which is essential in the mirror mounting zone. This allows for uniform pressure along the entire contact perimeter, which translates into a stable seal.

Condition of the component and service application

The BMW 7 Series E65 E66 Seal Outer Mirror Triangle Left N/S is a used component, making it an attractive service alternative for BMW vehicle owners who want to optimize repair costs while maintaining the original design. This type of component is suitable both for replacing a damaged mirror and for bodywork and paint repairs where resealing the mounting area is necessary.

Benefits of using an original foam seal

Using a dedicated foam seal in the BMW E65/E66 allows for maintaining the integrity of the door structure and reducing the risk of rattles, noise, and leaks in the mirror area. This solution promotes acoustic comfort inside the cabin and long-term protection against corrosion around the mounting point. For users who value maintaining factory solutions, this is a practical way to restore proper operating parameters in the left-side mirror area.

If you are planning a comprehensive repair or upgrade of the door and mirror area in your BMW and need other elements from the same group, such as additional seals, trim strips, or window-adjacent components, check out the available parts in the BMW Window seals and trims category.

For drivers interested in making informed choices regarding service components for premium cars, including BMW, it is worth reading the analysis of the used and original parts market, available in the article Crisis in the new parts market? Why used originals for premium cars (BMW, Mercedes, Porsche) are the hottest trend in 2026, which helps to better plan your vehicle repair and maintenance strategy.