Genuine OEM Volkswagen Hydraulic Belt Tensioner Support, part number 06M903417H. This component serves as the mounting bracket for the hydraulic belt tensioner, which maintains proper tension on the accessory drive belt. It is crucial for the reliable operation of components like the alternator, power steering pump, and A/C compressor. Constructed from robust cast metal, it provides the necessary strength and rigidity. Genuine OEM supports ensure exact fitment and proper alignment for the tensioner assembly.