Genuine OEM Mini Turbocharger Coolant Return Hose, part number 11537600674. This hose is responsible for returning coolant from the turbocharger back to the main cooling system, ensuring the turbocharger operates within its optimal temperature range. It connects the turbocharger's coolant outlet to the appropriate point in the cooling circuit. Genuine OEM hoses are constructed from materials resistant to heat and coolant degradation, ensuring reliable performance and preventing leaks.