Water Pump-to-Thermostat Hose, BMW - E82 135i/1M, E9X 335i, E60 535i, X6 35i

This is an original BMW coolant hose that connects the water pump and thermostat on N54 and N55 engines in the E82 135i/1M, E90/E92 335i, E60 535i, X6 35i (N54 only), and E89 Z4 35i. While not under a lot of stress this is often replaced as a "while you're in there" scenario or if the hose is damaged during turbo work.

This part is listed by BMW as BMW part number 11537545665 (11-53-7-545-665) and is described as Genuine BMW Coolant Hose (Water Pump to Thermostat), N54/N55.

This is a Genuine BMW coolant hose with a two year warranty. Buying a Genuine part will usually be more expensive than an OEM or aftermarket brand but you are assured that it meets BMW's designs for fitment, performance, and longevity. It will also be the very latest design, incorporating any updates or revisions that an aftermarket brand typically will ignore.