A final coolant leak was chased down on Thursday. It might have been the original leak which started a refresh. The shroud and fan were taken off. Only the drive belt was taken off. Using a small mirror and flashlight, the leak was found. No leaks under the 1 year old thermostat. The water pump had evidence of leaking for a while. The o ring was completely flat. Bolts were loose too. The pump has a BMW stamp on it. A new 125,000 mile warranty pump with a metal impeller is installed. A nut was dropped wearing gloves. It couldn't be found. Four new flat locking nut were used. The size is M6-1.00 if I remember correctly. I'll have to check the receipt.

A new URO coolant level sensor was installed. It still dings for low coolant. I'll top if off everyday for a week. If it doesn't clear, a dealer sensor will be tried.

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'06 X5 3.0i - bought @143,123 miles (12/26/20)