Audi A4 B7 Window Seal Door Rear Left N/S Sealing Gasket Strip 8E0839479

The Audi A4 B7 Rear Left Door Window Seal is an original part from the Window Seals and Trim category, designed for installation in the rear left door. It ensures a tight fit for the window, reduces wind noise, and helps maintain proper protection against water and dirt, contributing to stable vehicle operation.

Specifications and technical data

• SKU: 8E0839479
• Mark: Audi
• Condition: Used
• OEM Part Number: 8E0839479
• Substitutable numbers: 8E0839479, BG
• Location on the vehicle: Rear, Left
• Category: Window Seals, Gaskets & Trims

Purpose and Body Fitment

The seal is specifically designed for the rear left side of the vehicle, ensuring it matches the geometry of the door and window guide in the Audi A4 B7 generation. Precise fitting to the door frame shape facilitates installation and minimizes the risk of material stress during the window lifting mechanism's operation.

The placement identified as rear – left side allows for unambiguous identification of the part when planning a replacement and minimizes the risk of errors in selecting the correct component.

Sealing Function and Acoustic Comfort

The window seal is responsible for maintaining the glass's stable position within the door frame and for limiting the ingress of water, dust, and wind noise into the cabin. A correctly chosen part:

• reduces noise during high-speed driving,
• limits the risk of window fogging through better moisture separation,
• supports the smooth operation of the window lifting and lowering mechanism,
• helps maintain a stable microclimate inside the vehicle.

Therefore, replacing a worn-out seal with a functional part restores the original level of acoustic and functional comfort.

Characteristics of an Original Audi Part

This seal comes from the original Audi components line, meaning it adheres to factory dimensional standards and is compatible with factory mountings in the door. The design intended by the vehicle manufacturer ensures proper adhesion to the window and frame, without the need for modifications or on-site adjustments during installation.

The part is offered in used condition, allowing for an economical replacement while maintaining compliance with factory specifications. This solution is particularly beneficial for post-accident repairs or gradual body renovations where preserving the original door construction is a priority.

Benefits of Using a Dedicated Window Seal

Using the correct window seal in the rear left door of an Audi A4 B7 offers a range of practical benefits:

• Stable Window Guidance – reduces play and glass vibrations during driving.
• Improved Moisture Protection – minimizes the risk of water entering the door and cabin.
• Enhanced Driving Comfort – reduces noise in the rear part of the vehicle.
• Consistency with Factory Construction – no need to modify mountings or the door frame.

This solution is particularly recommended for replacing damaged or degraded components when predictable window behavior and consistent mechanism performance are desired.

Supplementing the Audi Seal Offer

If you also need other parts from the Window Seals and Trim category for this brand of vehicle, check out the Audi window seals and trim available in our assortment to comprehensively complete your body part set.

For drivers interested in a broader perspective on vehicle operation and component refurbishment, we recommend an article describing the renovation of diesel engines – more information can be found in the material Second Life for the Mercedes OM642 Engine – How Injectors and Turbocharger Restore Power to the 3.0 V6 CDI, which demonstrates how appropriately selected components influence the durability and refinement of systems in modern cars.