BMW Differential Output Flange Seal - Genuine BMW 33121205302

Product Information

A CV joint boot serves to protect the axle joint and axle by keeping out dirt, water, and debris while preserving the grease that lubricates the joint. As a vital component of the drivetrain system, it enables the wheels to move in coordination with the vehicle’s suspension. Regular inspection of CV boots is essential, and they should be replaced before any signs of failure appear. Replacing a boot typically involves removing the old one, reapplying grease, and fitting a new boot, which will require tools for expanding the boot over the joint as well as clamping a special style clamp on both ends to prevent exposure. At the point of service, it is also recommended to expect the condition of the joint, if the joint is damaged, a full joint replacement may be necessary.

• NVH: Clicking or popping sounds when turning or under load caused by binding in the joint during articulation
• Leakage: Grease splattered on or around the inward-facing side of a wheel and/or suspension components behind the spindle
• Drone: Humming or growling noises coming from a dry joint or a joint exposed to the elements

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.