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Old 01-31-2013, 12:07 PM
bimmerfan52 bimmerfan52 is offline
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Location: Arizona
Join Date: Feb 2012
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Mein Auto: 545i
Originally Posted by legend700 View Post
Coolant mixed 50/50 protects down to -34 deg. If your coolant actually froze, you would have more problems than just a warning message.

You need to check your antifreeze ratio, or if you can't do it have any reputable repair shop check it for you.

You will see some freezing of thin lines or narrow water passages first, before your block freezes hard enough to expand and crack it. But you can't take a chance ruining your engine. If you end up not driving the car for a few days and get a really bad cold snap your engine could be finished.

In fact I would consider bringing your ratio of coolant up to 65%, which should make you good to about -50F.
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