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Join Date: Jun 2009
Posts: 288
X3: Acrid Smell, Low Coolant ?

Would be great to have your thoughts :

1) We have an acrid smell in the cabin. Sometimes it smells like cigarettes, sometimes closer to coffee. It only smells when the heat is on - on / off verifiable that the smell goes away then comes back.

2) About 500 miles ago I topped up coolant with about a liter, because the low coolant light went on. It hasn't come back yet.

So my guess is that there is a leak in the heater core. Anyone have any other guesses?

Has anyone tried to pressure test the heater core with air to check it?

2007 X3 has 118k miles

Bruce
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2002 C4S 105kmiles
Boston MA
Old 02-03-2018, 10:52 AM
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