High quality water tank hose, OE part number 17128678491, is specially designed for BMW B46 and B48 engines. Made of upgraded multi-layer reinforced EPDM rubber material, this cooling hose possesses excellent high temperature resistance, pressure resistance, oil corrosion resistance and anti-aging performance. It can withstand long-term high heat and strong vibration in the engine compartment, maintaining good flexibility and sealing for long service life.Produced in full compliance with OEM specifications, it features precise dimensions and perfect interface matching. The tight connecting structure effectively prevents coolant leakage, cracking and deformation. It ensures smooth coolant circulation and efficient heat dissipation, stably maintaining normal engine temperature and avoiding overheating failure.Direct original car installation without modification, easy to replace aging, hardened and damaged original hoses. With stable quality, exquisite workmanship and competitive price, it is a cost-effective replacement part for daily repair, maintenance and aftermarket wholesale of BMW B46/B48 models.