BMW X3 Series E83 Rear Door Brake Gasket Cover Retainer Left N/S 3402735

BMW X3 E83 Rear Door Seal Mounting Left is an original body part from the Window Seals and Trim category, designed for installation on the left rear side of the vehicle. Precise fit to the BMW construction ensures a tight door seal, noise reduction, and proper protection of the interior from moisture. This is a practical solution for users who want to restore the factory door performance parameters in their BMW X3 E83.

Specifications and technical data

• SKU: 3452821
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 3452821
• Substitutable numbers: 51223452821, 3452821, 51223402735, 3402735, AS
• Location on the vehicle: Rear, Left
• Category: Window Seals, Gaskets & Trims

Intended Use and Vehicle Placement

The presented seal has been specifically designed for the rear left side of the BMW X3 E83 body. Its placement on the vehicle is clearly defined, which simplifies selecting the correct part for repair or replacement. This will help you avoid installation issues and the risk of improper fit to the door and body frame shape.

Technical and Functional Characteristics

The door seal plays a crucial role in maintaining acoustic comfort and protection against external factors. The component's construction is adapted to factory mounting points, allowing for stable installation within the door and body. The appropriate seal profile supports:

• preventing water and moisture from entering the vehicle's interior,
• reducing wind noise during driving,
• maintaining proper door-to-body pressure,
• ensuring correct lock and hinge operation through uniform force distribution.

As an original BMW part, the seal complies with factory dimensional and material standards, which translates to predictable performance in use and compatibility with other door components.

Original Origin and Interchangeable Numbers

The product belongs to the BMW OEM parts group, meaning it was developed specifically for a particular vehicle model and generation. The seal has a dedicated part number and associated interchangeable numbers, making it easy to verify its compatibility with your BMW X3 E83 in manufacturer catalogs or parts selection systems. Such designations are particularly useful when comparing parts from different model years or equipment versions.

Product Condition and Service Application

The offered rear door seal mounting left is a used part, making it an attractive cost alternative to new OEM components. This type of part is suitable for accident repairs, replacing worn or leaking seals, and for comprehensive restoration of the BMW X3 E83 body. A properly selected seal helps restore the original door functionality and improve the vehicle's daily comfort of use.

Benefits of Using an Original BMW Seal

Using an original door seal in the BMW X3 E83 maintains the body's structural integrity and avoids problems typical of imprecisely dimensioned aftermarket parts. The most significant benefits include:

• factory fit to the door and body frame shape,
• stable mounting at manufacturer-designated points,
• maintaining proper passenger cabin sealing,
• reducing the risk of accelerated corrosion around sills and pillars.

Therefore, replacing a worn seal with an original BMW part is a sensible service solution that supports long-term, trouble-free vehicle operation.

If you are planning a comprehensive door refurbishment for your BMW and also need other sealing elements or trim pieces mounted around the windows and doors, check out the available parts in the BMW Window Seals and Trim category.

For drivers interested in improving visibility and driving safety, as well as selecting original lighting components, a guide describing the selection of used headlights and accessories may be useful – you can find it here: complete guide to selecting and replacing used LED and Xenon headlights.