Genuine OEM Audi Coolant Reservoir Hose, part number 7L0121156F. This essential hose connects the coolant reservoir to the main engine cooling system, facilitating the flow of coolant and maintaining the correct fluid level. It is a multi-branched assembly designed for precise routing within the engine bay. Weighing 0.76 kg and measuring 0.82 m in length, this hose is manufactured from robust, heat-resistant rubber. Using a genuine OEM hose guarantees the correct material composition and exact routing geometry, preventing leaks and ensuring the integrity of the cooling system.