Genuine OEM Audi Engine Hydro-Mounting, part number 4F0199379BJ. This advanced hydraulic mount is designed to actively dampen engine vibrations, providing superior ride comfort and reducing noise. It is specifically installed on the left side of the engine, contributing to balanced engine support. Weighing 1.121 kg, it utilizes hydraulic fluid to adapt its damping characteristics, often controlled electronically. Choosing a genuine OEM hydro-mounting ensures precise electronic calibration and fluid dynamics, critical for optimal vibration isolation and vehicle refinement.