Genuine OEM Audi brake caliper support, part number 4E0615375D. This bracket provides the necessary mounting point for the brake caliper, ensuring it is correctly aligned with the brake disc. This part is for the left side of the assembly as indicated in the diagram. Genuine OEM caliper supports are manufactured to strict tolerances to ensure the caliper remains stable under heavy braking loads, preventing uneven pad wear and ensuring consistent, safe braking performance.