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      09-04-2019, 02:28 PM   #8
MrSweet1991
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Drives: BMW E90 330D M Sport
Join Date: Apr 2017
Location: West Midlands

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Quote:
Originally Posted by 1 AKY View Post
Where is this Auxiliary Water Pump in the engine bay and what's its purpose?
our UK models it's on the right hand side, attached to the wheel arch almost. can help with hot spots in engine as it can circulate the coolant after you turn the car off, but one of the benefits I wanted it for was you can put ignition on, turn blower fan speed to lowest setting, temperature to highest and then hold accelerator for thirty seconds and it will activate the auxiliary pump to automatically bleed the coolant after flushing and renewing the coolant. it also helps to keep the cabin air warm when the engine has been shut off, again because it continues to circulate the coolant