BMW Suspension Stabilizer Bar - Genuine BMW 31305A52D41

Product Information

BMW Sway Bars diagram for M240i xDrive, M440i xDrive Gran Coupe, M340i xDrive

A sway bar—also called an anti-roll bar or stabilizer bar—is a suspension component designed to reduce body roll during cornering. It essentially a metal rod that connects the left and right wheels (usually via short sway bar links) and twists slightly when the vehicle leans. This twisting action helps keep the car flatter in turns, improving stability and handling.

• Excessive Body Roll in Turns: The car leans more than usual when cornering, making it feel less stable.
• Clunking, Knocking, or Rattling Noises: Often heard when driving over bumps or during turns—usually from worn or broken sway bar links/bushings.
• Loose or Wandering Steering Feel: The steering may feel less precise or the car may “float” more, especially on curves.
• Uneven or Premature Tire Wear: Poor handling can lead to increased stress on certain tires.
• Reduced Cornering Grip: The car might feel like it’s losing traction sooner when turning.

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.