BMW F31 Window Guide Seal Gasket Left N/S Rear Door 7258341

BMW F31 Rear Left Door Seal is a precisely fitted body component designed for the rear left door wing on the 3 Series Touring models. It is responsible for ensuring a tight door seal, reducing noise, and protecting the interior from moisture and dirt, while also maintaining the door's stable positioning within the body frame. Thanks to its construction, which aligns with original BMW solutions, the seal helps preserve the technical and aesthetic integrity of the entire vehicle.

Specifications and technical data

• SKU: 7258341
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7258341
• Substitutable numbers: 7258341, 51357258341, 51357414535, 7414535, 51352580949, 2580949, 51337137013, 7137013
• Location on the vehicle: Rear, Left
• Color: Black
• Category: Door Seals

Purpose and Function of the Seal

The presented seal belongs to the Door Seals category and is specifically designed for installation on the rear left door of the BMW F31 body. Its purpose is to create a continuous, flexible barrier between the door edge and the car body, which results in:

• limiting the penetration of water and moisture into the cabin,
• reducing wind noise and external noise,
• stabilizing the door's position relative to the body frame,
• protecting metal edges from accelerated corrosion.

This component directly impacts acoustic comfort, sealing, and the durability of the door area, which is particularly important for vehicles used daily and on longer journeys.

Construction, Color, and Fitment

The seal is made in a black color, allowing it to harmonize with the factory finishes of the door frames and pillars in the BMW F31. The profile shape and corner geometry are adapted to the specific position on the vehicle, facilitating installation and ensuring proper adhesion around the entire door perimeter.

As a component dedicated to a specific side and axis of the vehicle, the seal is intended exclusively for the rear left door wing, minimizing the risk of improper fitment. The appropriately selected material flexibility allows for repeated opening and closing of the door without loss of sealing under typical operating conditions.

Benefits of Using an Original BMW Seal

Using a door seal dedicated to the BMW F31 offers a range of practical benefits for daily vehicle use. The most important include:

• Compatibility with Body Construction – the seal's profile and length are adapted to the factory door frame, simplifying installation and reducing the need for additional adjustments.
• Visual Consistency – the black seal maintains the original appearance of the door edges, without undesirable color contrasts.
• Improved Acoustic Comfort – the correctly chosen seal cross-section helps reduce the ingress of external noise into the passenger cabin.
• Protection of Sill Area and Door Edges – reduced contact of moisture and dirt with painted surfaces promotes slower corrosion.

Choosing a component specifically designed for the BMW helps maintain performance parameters close to factory solutions, which is important for both comfort and body durability.

Characteristics of a Used Product

The offered door seal is a used item, meaning it comes from a dismantled vehicle and may show signs of normal wear and tear. Such components are often chosen for accident repairs or for restoring sealing in older vehicles where maintaining compatibility with the original construction at a reasonable service cost is crucial.

For installation, it is recommended to thoroughly clean the contact surfaces on the door frame and body, and to check the seal's placement around the entire perimeter to fully utilize its sealing and acoustic properties.

If you are planning a comprehensive repair or upgrade of the door area in your BMW and need other parts from the same group, such as frame seals, sill seals, or additional sealing profiles, check the available parts in the BMW Door Seals category.

For users interested in a broader context of vehicle servicing, including selecting components by identification numbers and the principles of proper component operation, the advisory article Fuel System – Injectors, Pumps, and Fuel Tank: Maintenance and Repair may be helpful, as it discusses practical aspects of diagnostics and selecting parts by factory markings.