Cooling fan and heatsink for

HP 821185-001 is a heatsink and fan assembly for cooling supported HP notebook configurations with discrete graphics. The combined thermal module and fan are intended to work together to move heat away from the system’s components during operation.

This part is identified with service part number 6043B0178701. Listed compatible systems include HP EliteBook 755 G3, EliteBook 850 G3 and G4, and Spectre Pro x360 G2. It is a model-specific cooling assembly, so its listed compatibility is tied to those configurations rather than notebooks in general.