Genuine OEM Volkswagen Toothed Belt Guard, part number 028109123AC. This component serves as a protective cover for the toothed timing belt, shielding it from external contaminants such as dirt, oil, and debris, which could compromise its function and lifespan. It is located on the front of the engine, covering the timing belt mechanism. Made from durable plastic or metal, it is designed to withstand engine bay temperatures and vibrations. Genuine OEM toothed belt guards ensure the timing belt remains clean and protected, crucial for maintaining precise engine timing and preventing catastrophic failure.