BMW Outer Weatherstrip Left (Alu Satiniert) - Genuine BMW 51377275785

Product Information

BMW Rear Window diagram for 640i, 640i xDrive, 650i, 650i xDrive, M6

The quarter glass seal is a molded rubber weatherstrip designed to create a watertight and airtight barrier around the vehicle’s fixed rear side (quarter) glass. It prevents water leaks, wind noise, and dust intrusion while helping to stabilize the glass within the body frame. Made from durable, UV- and weather-resistant rubber, the quarter glass seal also contributes to cabin comfort and preserves the vehicle’s overall fit and finish.

• Water leaks or moisture inside the cabin – a common sign of a deteriorated or misaligned seal.
• Increased wind noise at highway speeds – caused by gaps or hardened rubber.
• Visible cracks, shrinkage, or deformation – indicates aging material and reduced sealing performance.

About Genuine BMW

The original parts used by BMW to build your car are available as replacement parts under the “Genuine BMW” brand. When ordering a Genuine BMW part you are guaranteed to get the same part that you would pick up from your local dealerships part department. Genuine BMW parts have been built to BMW’s stringent standards and are the same quality of the original parts used to build your Ultimate Driving Machine.

You may not realize this, but the parts that make up your BMW are not necessarily manufactured by BMW. No cause for concern, as BMW designs the part, hires a manufacturer, and ensures its quality to you. In fact, many of these manufacturers have been making parts for BMW for decades. In our industry these manufacturers are called OEM (Original Equipment Manufacturers), and these are often brands you recognize, including Lemforder, ZF, Sachs, Bosch, Valeo, Zimmermann, Siemens VDO, Corteco, and more. Don’t be surprised to open that Genuine BMW parts box and find an OEM branded part inside, simply with the addition of a BMW logo.

Be sure to keep an eye out for OE tags on our product pages to quickly identify parts coming direct from OE manufacturers. That extra bit of insight could save you some serious money while shopping! Refer to our OE Academy for further information regarding the OE/OEM tags throughout the site.