Genuine OEM Audi Engine Retaining Plate, part number 4H0399059B. This robust metal plate is a critical structural component designed to securely hold the engine in its proper position. It is located on the left side of the engine mounting assembly, contributing to stability and vibration control. Weighing 0.511 kg and measuring 0.155m x 0.154m x 0.07m, this genuine OEM part ensures precise fitment, correct load distribution, and long-term durability for engine support.