Question about 2003 BMW 5 Series
If there is wetness on pass sidefront , very well could be heater core issues. Start with replacing thermostat much, much cheaper. However dampness on passenger side is not good. best of luck
Posted on Feb 16, 2014
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Posted on Jan 02, 2017
SOURCE: coolant leak and overheating
I had a water leak on my 730i I found it after much trouble.A hairline crack in the plastic thermostat housing which onlly opened up when hot and of course got worse as water level dropped.Hope this helps.
Posted on Oct 30, 2009
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