Andrew, you speak of pump replacement motor , not the unit. It is sold that way? I seem to only find the entire unit with the extension float. What not replace it all? Is it easy to replace just the motor when the unit is out? My wheel bearings are fine, I don't hear any aircraft whine. BUT, my new conundrum is missing coolant. This happens every few months. The other day I check the o.f bottle and it's empty. Fill it, and for the past three days it's fine. I am wondering, can extensive high RPM driving suck a small amount of coolant into combustion chambers given the high mileage(250K)? I can't seem to find any coolant leaking on the ground. During normal driving n high RPM temp range is perfect. I also look n listen under the hood as soon as I stop driving after reaching normal temp. I am confounded by this one. NO codes either.

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X5 3.0 AUTO -2001 - 238,000 miles