I noticed that coolant had overflowed out of the top of the expansion tank. The cap was on but maybe not turned all the way to the "click".

Is it normal for this to happen or should I be worried? The coolant level is below the 'minimum' point, not sure how much. No warning yet. Can I add some distilled water or do I have to go to my dealer to get BMW coolant?

This Beemer noob thanks you for any info and wishes all a happy and safe holiday season.



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