740i /93 Electric Water Pump problem

Hi plastic intake tub to electric water pump just broken. Any idea if is replaceable front part of this pump - or I have to look for all pump. What this pump is for?
Never saw this pump in another car! Best regards bmer lover. George
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jp wrote:

This auxillary water pump is to help get the hot coolant into the heater matrix. You will have to replace the whole pump.
Been there, done that.
--
-Fred W

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