BMW F31 Door Window Strip Seal Gasket Trim Outer Rear Left N/S 7258291

BMW F31 Window Seal Strip Left Rear Door Left Rear is an original body part from the Protective and Decorative Strips group, designed for installation in the rear left door of the 3 Series F31 Touring. The precisely fitted geometry of the seal ensures stable window guidance and limits the ingress of water and dirt into the door interior, contributing to the longer lifespan of the window regulator mechanisms. This is a practical solution for users who want to restore factory fitment and the aesthetic appearance of the vehicle's side body.

Specifications and technical data

• SKU: 7258291
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7258291
• Substitutable numbers: 7258291, 51357258291
• Location on the vehicle: Rear, Left
• Category: Body Mouldings & Trims

Purpose and Function of the Part

The presented seal strip operates in the area of the rear left door window, where it is responsible for guiding the window edge and sealing the contact between the glass and the door frame. This reduces air flow noise, minimizes window vibrations, and helps maintain a stable window position while driving. The use of an original BMW component contributes to maintaining the correct body geometry and proper operation of the window regulator mechanism.

Benefits of Using an Original Seal Strip

Using a factory seal strip in the BMW F31 offers a range of practical operational benefits:

• better fit to the door profile and window frame compared to aftermarket alternatives,
• reduction of air drafts and noise at higher speeds,
• increased protection of the door interior from moisture and dirt,
• stable window guidance, which reduces the risk of jamming or misalignment,
• maintenance of a cohesive side body line and an aesthetically pleasing appearance of the window edge.

For users who care about the technical and visual condition of their vehicle, it is important that the original protective strip allows for the restoration of factory window operating parameters without the need for modifications to the door structure.

Installation Characteristics

The part is designed for direct installation in its designated location on the rear left pair of doors. The appropriately shaped profile works with the factory mounting points, which facilitates service work and reduces replacement time. In practice, this means that after removing the old seal strip, the new part can be fitted without additional modifications, maintaining proper adhesion to the window and door frame.

Application in Used Vehicles

In vehicles used daily, window seals and strips are exposed to UV radiation, temperature changes, and mechanical wear during window operation. Replacing a worn strip with an original component from the Protective and Decorative Strips group helps limit further degradation of the door interior and improves cabin acoustic comfort. This is particularly important for vehicles where leaks, creaks, or noticeable window play have appeared when closing the doors.

If you are planning a comprehensive repair or upgrade of the side body area of your BMW and need other parts from the same group, such as covers, overlays, or additional strips, check the available parts in the BMW Protective and Decorative Strips category.

Technical Support and Parts Selection

When selecting body parts for specific equipment versions and model years, it is helpful to use manufacturer codes and verify compatibility based on the model and vehicle placement. If in doubt, it is advisable to consult with a service center or technical documentation to select the seal strip precisely for the rear left side of the vehicle. For users interested in a broader context of selecting components by manufacturer codes and optimizing operating costs for used parts, the guide article Why Buy Used Gearboxes and Engines – Facts Instead of Myths, which discusses practical aspects of working with manufacturer numbers and selection procedures, may be useful.