Genuine OEM Audi Gearbox Synchronizer Ring, part number 012311247F. This component is crucial for the manual transmission, helping to synchronize the rotational speeds of gears and shafts for smooth, precise gear changes. It is located within the gearbox assembly. Crafted from durable brass or bronze alloy, it measures approximately 91mm in diameter and 10mm in height. Using a genuine OEM synchronizer ring ensures precise fitment and factory-specified friction characteristics, which are vital for reliable and long-lasting transmission operation.