BMW Drum Brake Wheel Cylinder - Genuine BMW 34211154236

Product Information

A drum brake wheel cylinder is a hydraulic component in drum brake systems. It is mounted inside the brake drum and uses hydraulic pressure from the master cylinder to push pistons outward, forcing the brake shoes against the drum surface to slow or stop the vehicle. Wheel cylinders are crucial for effective braking but can wear out over time due to heat, corrosion, and seal deterioration.

• Brake fluid leaks – visible fluid around the drum or inside the wheel, often causing low brake fluid levels.
• Poor braking performance – soft brake pedal, reduced stopping power, or uneven braking.
• Contaminated brake shoes – brake fluid soaking into the shoes, leading to grabbing, pulling, or noise during braking.

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.