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      01-19-2013, 06:59 AM   #12
mspringer
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Drives: BMW X3 35i M-Sport/DHP
Join Date: May 2011
Location: NJ

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2021 BMW X3 M40i  [0.00]
2002 BMW M3  [0.00]
There is a relatively small difference is coolant necessary to bring the level from the add mark (where you can just no longer see the level) to the full mark. When the weather gets cold the coolant volume shrinks and the level can fall below the add mark triggering the sensor, especially if BMW (dealer) didn't fill to the top to begin with. As stated above the add coolant warning is pretty common when the when the weather turns cold. Happened on mine, but only when started from cold but, after a few minutes as the car warmed and the volume expanded the light when out and stayed out until the next morning when the car was again cold. This occurred during a 4wk trip and I just brought the car to dealer I passed who added 50/50 mix to the full line and I've no lights since.
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