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      12-05-2020, 03:31 PM   #7
Orion4
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Drives: 2013 335i Sport Line Sedan
Join Date: Aug 2009
Location: Melbourne, FL

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Pressure test! Also check underneath the coolant reservoir where the electrical connector is matted. That's where I finally found my very similar leak. There was a very small crack in the tank where the connector attached. Corroded the connectors to the point I had to splice a new connector to the wires when I installed the new tank. No problem since then.