I noticed a coolant leak after a day of driving.

The leak seems to have been coming from the auxiliary water pump or one of the connecting hoses.

There was a whistle that was happening just a few days before I noticed the leak, but not sure if that's related to the leak at all.

So I identified the general area of the Leak. Not sure if its caused by the aux. pump failing and leaking, or if a hair line crack in either of the attaching hoses.

Any help would be really appreciated.. Thank you in advance!

I've noticed that the only post I found of leaking Aux. pumps were on 5 series sedan's and couldn't find anything on X5's. I guess the leaking aux pump does happen, but not sure how often it happens in X5's. Are these the same parts? Am I barking up the wrong tree by changing out my aux. pump??

Thanks!!

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