Coolant switch valves control the coolant flow in side-flow cooling circuits of the powertrain and in the heating circuits of passenger compartments. In hybrid and electric vehicles, they can be used for coolant flow distribution, e.g. for cooling the battery and power electronics. They increase comfort, optimise performance and reduce CO2 emissions. Thanks to tried-and-tested engineering, Bosch valves achieve a high quality level.



Resistant to dirt particles and leak-proof over the entire service life

3 million

switching cycles over the entire service life