Genuine OEM Audi Rear Differential Bonded Rubber Bushing, part number 4M0599381R. This essential component is designed to provide critical cushioning and support for the rear differential assembly. It effectively absorbs vibrations and reduces noise, contributing to a smoother and quieter ride. Made from a combination of rubber and metal, it weighs approximately 0.397 kg. Using a genuine OEM bushing ensures the correct rubber durometer and precise dimensions, which are vital for maintaining proper differential alignment and preventing premature wear.