BMW Synchronizer Ring - Genuine BMW 23211224873

Product Information

BMW Manual Transmission diagram for 325xi, 328Ci, 328i, 328is, 330Ci, 330i, 330xi, & more

A manual transmission synchro ring (synchronizer ring) is a precision-machined brass or steel component inside a manual gearbox. Its role is to match the speed of the gear being engaged with the speed of the shaft, allowing smooth, grind-free shifting. It uses friction surfaces to “synchronize” gear speeds before the dog teeth engage.

• Gear grinding during shifts, especially when moving into 2nd or 3rd gear.
• Difficulty engaging gears, requiring extra force on the shifter.
• Gear pop-out under load, as worn synchros fail to hold the gear securely.

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.