Genuine OEM Audi Alternator Bracket Holder, part number 057903143L. This essential component is designed to securely support and position the alternator, preventing movement and ensuring proper belt tension and alignment for optimal charging system operation. It is typically mounted within the engine assembly. Constructed from durable cast metal, this bracket provides robust structural integrity. Choosing a genuine OEM bracket ensures precise mounting points, correct alignment, and the necessary strength to withstand engine vibrations and stresses, preventing premature wear on the alternator and drive belt.