Genuine OEM Audi Front Brake Caliper Retaining Spring, part number 1K0615269. This spring is crucial for applying tension to the brake caliper components, ensuring they remain properly seated and function correctly. It helps to prevent brake pad rattling and ensures consistent contact with the brake rotor, which is vital for effective and quiet braking. Constructed from durable metal wire, it weighs approximately 0.0156 kg and measures 17.3 cm in length. Using a genuine OEM retaining spring guarantees the precise tension, material quality, and corrosion resistance required for safe and reliable braking performance.