Quote:
Originally Posted by SoCal540
Agreed use BMW coolant only or distilled water to top off. Ideally a mix of 50/50. I had the same issue low coolant in the main reservoir at 7500 miles but the aux was fine.
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not if your dealer wouldn't flush it and you can't get a tow truck, I did have to mix some other suppose BMW qualified ones as well (per my dealer's tech they took a look and said it was fine...)