Genuine OEM Audi Engine Coolant Hose, part number 4M0121447BC. This critical component is part of the engine cooling system, responsible for transferring coolant between various engine components. It ensures efficient heat dissipation and maintains the engine at its optimal operating temperature. Weighing 0.033 kg, this hose is constructed from high-quality, heat-resistant rubber or silicone, designed to withstand extreme temperatures and pressures. Using a genuine OEM hose guarantees correct routing, precise fitment, and resistance to degradation from coolant chemicals, preventing leaks and overheating.