Genuine OEM Audi Coil Pack Wiring Sheath, part number 4Z7971824B. This sheath is designed to protect the wiring for the ignition coil packs, preventing damage from heat, abrasion, and environmental factors. It ensures the integrity of the electrical connections to the ignition system, which is critical for proper engine operation. The sheath is specifically shaped to fit over the wiring harness leading to the coil packs. Genuine OEM parts offer the exact fit and material properties needed to protect sensitive electrical components.