BMW F74 Gran Coupé Inner Door Window Seal Gasket Rubber Rear Left N/S 5A5CC17

The Left Rear Door Window Seal for BMW F74 Gran Coupé is a precisely fitted component from the Window Seals and Trim group, designed for installation on the rear left side. It is responsible for the seal between the window and the door, noise reduction, and protecting the interior from water and dirt, which contributes to the stable operation of the window regulator and the acoustic comfort of the cabin.

Specifications and technical data

• SKU: 5A5CC17
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 5A5CC17
• Substitutable numbers: 5A5CC17, 51355A5CC17
• Location on the vehicle: Rear, Left
• Part type: Window Seal
• Category: Window Seals, Gaskets & Trims

Purpose and Function of the BMW F74 Gran Coupé Window Seal

The described seal is an internal component of the rear left door, specifically designed for the F series Gran Coupé body. Its purpose is to guide the window in the correct track, stabilize the glass edge, and reduce play during the operation of the window regulator. This ensures that the window moves smoothly, without excessive vibrations and unwanted noises, and the window edge remains properly sealed against the door panel.

A properly selected internal seal also contributes to reducing aerodynamic noise at higher speeds and protecting the door's interior from excessive moisture ingress, which is important for the durability of mechanisms and electrical installations within the door.

Construction and Body Fitment

The seal is designed as a dedicated component for the specific geometry of the rear left door in the BMW F74 Gran Coupé. The appropriate rubber profile and the shape of the guide strip ensure proper adhesion to the door frame and the window edge, minimizing the risk of leaks and improper glass guidance.

Being an original BMW part means retaining original mounting points and compliance with factory body tolerances. This ensures predictable installation without the need for modifications or forcing the component into place, and the contact line between the window and the seal remains consistent with other door trim elements.

Benefits of Using an Original Internal Seal

Using an original internal window seal in the BMW F74 Gran Coupé allows for restoring proper sealing and smooth window operation on the rear left side. In practice, this means:

• limiting the ingress of water and dirt into the door interior,
• reducing cabin noise originating from the window area,
• stable operation of the window regulator mechanism,
• maintaining a consistent appearance of the window edge in relation to other trim elements.

This component group is particularly important for tasks involving window replacement, window regulator repair, or addressing leaks that manifest as wind noise or moisture appearing around the lower part of the door.

Condition and Service Application

The offered seal is a used part, which means it allows for economical repair while maintaining the original manufacturer's specifications. This type of part is well-suited for situations where the existing seal is mechanically damaged, deformed, or has lost its elasticity, causing leaks or improper window guidance.

When replacing, pay attention to the correct seating of the seal in the door cavity and even pressure along the entire contact length with the window to fully utilize its protective and acoustic functions.

Related Parts and Additional Technical Information

If you are planning a comprehensive repair or upgrade of the window and door area in your BMW and need other parts from the same group, such as additional seals, trim strips, or window guides, check the available parts in the BMW Window Seals and Trim category.

For service work on the body, door system, or windows, it is also advisable to ensure the proper condition of the engine unit and its accessories – you can find more practical information on the impact of engine operating temperature on component durability in the article Engine Cooling System – Overheating, Repair, and Used Radiators, which discusses solutions used in BMW models, among other things.