Original quality upper exhaust water tank pipe with OE number 17127599452, a key cooling system part for BMW models. Made of original formula multi-layer reinforced EPDM rubber, this upper radiator pipe owns excellent high temperature resistance, high pressure resistance, coolant corrosion resistance and long-term anti-aging performance. It can withstand long-time under-hood high temperature, frequent cold and hot cycles and engine vibration, effectively preventing hardening, cracking, swelling and liquid leakage.Produced in full compliance with OEM standards and original vehicle data, it features accurate size, perfect bending radian and integrated leak-proof connectors. Smooth inner wall ensures unobstructed coolant circulation and efficient heat dissipation, stably controlling engine working temperature and avoiding overheating risks.Direct OE plug-and-play installation without modification. It is an ideal original replacement for aging, brittle and damaged stock pipes. With original grade quality, tight sealing and long service life, it is suitable for daily repair, maintenance and bulk wholesale of BMW series.