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Old 01-31-2013, 01:22 PM
jtwrights jtwrights is offline
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Location: Chicago
Join Date: Jun 2009
Posts: 10
Mein Auto: 2005 BMW X3
2005 X3 Low Temperature Gauge and Cold Weather

I have a 2005 X3 with approx. 80k miles. Recently, I have been experiencing low engine temperatures and the coolant warning light activating while traveling at high speeds in cold weather.

I live in Chicago and on a few days the ambient temperature has been below 20 degrees F. While traveling on the expressways (speeds in excess of 45 mph) the engine temperature gauge recedes to the blue. Shortly thereafter the coolant light activates on the dash and the heater in the car loses any heated output. I've checked the coolant level and it is fine.

When traveling on surface streets (relatively low speeds under 40 mph) the engine temperature is fine and pegs in the middle of the gauge. The interior heater also works just fine.

Any clue as to what is going on? I've searched these forums and haven't found anything similar to my situation. I would like some background before calling my repair shop (if necessary). Thank you in advance for any assistance!!!
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