Genuine OEM Audi Engine Coolant Pipe, part number 4M0121075E. This pipe is a critical component in the engine cooling system, responsible for circulating coolant between various engine components to dissipate heat. It is a rigid pipe, precisely formed for correct routing within the cooling assembly. Weighing approximately 0.111 kg, it measures 0.345m in length. Choosing a genuine OEM coolant pipe ensures an exact fit, proper fluid sealing, and resistance to thermal and pressure stresses, preventing leaks and maintaining cooling system integrity.