Genuine OEM Audi Brake Pad Wear Indicator Contact, part number 80A615121. This component is a crucial safety feature that monitors the thickness of the brake pads. When the pads reach a minimum thickness, this sensor makes contact, triggering a warning light on the dashboard. It is specifically designed for the rear right brake assembly. Using genuine OEM parts ensures the correct electrical signal and reliable activation of the warning system, maintaining optimal braking performance and safety.