- unplug washer

- turn off water supply at shut off valve on the wall

- unscrew the water fill hoses from the washer

- remove three torx screws in the back of the top panel

- panel pull back and lifts off

- water inlet valve is right there, remove obvious screws and wire harnesses and install the new valve

Cold water valve:

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Hot water valve:

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Source: Bosch WFMC3200UC Washing Machine