BMW 3 Series E90 E91 Inner Rear Left Door Window Seal Strip Cover N/S 7136139

BMW 3 Series E90 E91 Inner Rear Left Door Window Seal Strip Cover is a precisely fitted body component designed for the rear left door window in 3 Series E90 models. It is responsible for guiding the window tightly, reducing wind noise, and protecting the interior from water and debris, while providing an aesthetic finish to the door edge. This solution is particularly useful for professional repairs or restoration of the side body area in BMW vehicles.

Specifications and technical data

• SKU: 7136139
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7136139
• Substitutable numbers: 51357136139, 7136139
• Location on the vehicle: Rear, Left
• Category: Door Seals

Purpose and function of the component

The rear left door window seal strip in the BMW E90 works in direct contact with the glass, stabilizing its movement during opening and closing. A properly selected sealing profile helps to limit water ingress into the door interior and reduces wind noise at higher speeds. This improves the acoustic comfort of the cabin and the durability of the window regulator mechanism.

This component from the Door seals category is crucial for maintaining the tightness of the window perimeter, and its proper fit to the rear left side of the body minimizes the risk of leaks and improper window operation.

Compatibility and fit for BMW E90

The seal has been designed specifically for the geometry of the rear left door in the BMW 3 Series E90 generation, which translates into proper adhesion to the door frame and window edge. The appropriate profiling allows for the maintenance of factory gaps and body lines, which is important from both an aesthetic and aerodynamic point of view.

Thanks to the use of original mounting geometry, the strip allows for the service replacement of a worn component without the need to modify the door structure. This solution is particularly beneficial for accident repairs, replacing corroded seals, or eliminating leaks in the rear part of the vehicle.

Performance characteristics and installation benefits

Replacing the rear left door window seal strip allows you to restore proper window operation and reduce common operational problems, such as:

• increased cabin noise originating from the rear door area,
• water stains on the upholstery or in the lower part of the door,
• looseness and vibration of the window when driving on uneven surfaces.

A properly selected seal also helps to relieve the window lifting mechanism by reducing friction in the guide. This, in turn, can translate into a longer service life for the regulator and more stable operation of the entire system. For the user, this means more predictable window operation and better protection of the vehicle interior.

Installation area and service aspects

The component is intended for installation in the rear left part of the body, within the door frame and window guide. This location requires precise seating of the seal in the factory mounting points to ensure even pressure along the entire length of the window edge. With proper installation, it is possible to maintain the factory level of tightness and reduce the risk of creaking and squeaking during door operation.

In service practice, replacing the seal strip is often performed in parallel with window adjustment or regulator repair, which allows for a comprehensive restoration of the entire rear left door assembly. This is particularly important in vehicles operated in harsh weather conditions, where seals are exposed to intensive wear.

Summary and additional resources

BMW 3 Series E90 E91 Inner Rear Left Door Window Seal Strip Cover is a practical body component that helps maintain proper tightness, acoustic comfort, and correct window guidance in the rear left part of the vehicle. Using a dedicated seal allows for the service replacement of a worn component while maintaining the factory operating parameters of the door and window.

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 additional perimeter seals, window trim strips, or lower edge seals, check the available parts in the BMW door seals category.

For drivers also analyzing the condition of the drivetrain and planning to purchase used components, a guide on choosing a transmission may be useful – more information can be found in the article Gearbox: manual, automatic, or DSG – typical faults and a guide to buying a used transmission.