BMW F20 Rear Door Inner Weatherstrip Trim Left N/S 51347240843 7240843

BMW F20 Rear Door Inner Weatherstrip Trim Left N/S is a precision body component from the Doors and door panels category, responsible for sealing and ensuring smooth window operation in the rear left door. Using an original weatherstrip helps maintain proper protection against water, noise, and debris, while also supporting the correct operation of the window regulator mechanism. This is a practical solution for BMW users who expect a solid fit and predictable installation.

Specifications and technical data

• SKU: 7240843
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7240843
• Substitutable numbers: 51347240843, 7240843, 51334886941, 4886941
• Location on the vehicle: Rear, Left
• Category: Doors & Door Skins

Purpose and function of the component

The rear left door window weatherstrip has been designed specifically for the BMW F20 body, taking into account the door geometry and window guidance in this model. It is responsible for:

• sealing the contact point between the window and the door edge,
• limiting the ingress of water and dust into the door interior,
• reducing wind noise while driving,
• ensuring stable window guidance in the channel.

Thanks to its fitment for a specific location on the vehicle (rear, left side), the component works in harmony with the factory door construction, which helps maintain body integrity and cabin acoustic comfort.

Benefits of using an original weatherstrip

Using a dedicated weatherstrip in the BMW F20 allows you to avoid problems typical of aftermarket parts with a universal profile. Factory-matched shape translates into proper adhesion to the window and door frame, which reduces the risk of leaks and unwanted vibrations. Maintaining proper sealing is important not only for comfort but also for protecting internal door components, such as wiring harnesses or the window regulator mechanism.

A used component from original BMW production is a sensible choice for drivers who want to maintain the technical consistency of the vehicle while optimizing repair costs. Proper fitment with the door facilitates installation and helps reduce service time.

Placement on the vehicle and installation aspects

The trim is intended for installation in the rear left door, which is important when planning repairs or replacing components in this part of the body. Precise fitment to the specific side of the vehicle minimizes the need for additional modifications and allows for maintaining the body line in accordance with the manufacturer's specifications. In practice, installation comes down to removing the old seal and seating the new one in the factory-provided mounting points, while following the correct sequence of work regarding the window and door upholstery.

Application in service and body repairs

The component will prove useful both for local repairs after mechanical damage and for gradual restoration of the door area in a BMW F20. Replacing the weatherstrip is recommended in situations where the following occur:

• water leaks around the window area,
• increased noise in the cabin at higher speeds,
• difficulties in closing the window smoothly,
• visible damage or deformation of the old seal.

Selecting the correct component from the Doors and door panels group allows you to restore the original functional properties of the door without interfering with the body structure.

Repair expansion – other BMW door components

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

Practical maintenance tips

After installing the trim, it is worth paying attention to the proper closing of the window and the even adhesion of the seal along its entire length. Regular cleaning of the window edge and the trim itself reduces the accumulation of dirt, which can affect the operation of the window regulator mechanism and accelerate the wear of rubber components. In the case of broader service work on the vehicle, including the electrical system or engine accessories, helpful materials such as a practical guide on replacing an alternator with a used one may be useful, supporting an informed approach to choosing used parts.

Summary

BMW F20 Rear Door Inner Weatherstrip Trim Left N/S is a dedicated body component that helps maintain sealing, acoustic comfort, and correct window guidance in the rear left door. Choosing an original trim from the Doors and door panels group supports trouble-free installation and the preservation of the vehicle's factory performance parameters, which is particularly important for professional repairs and servicing of BMW vehicles.