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Old 09-10-2010, 06:59 PM
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Join Date: Feb 2009
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Mein Auto: 97 740iL
Cody, that is true, but I believe that the thermostat in our cars will still open even if the harness is disconnected, and since he said that nothing at all happened when he dropped it in boiling water, I'd guessed that it was faulty. I believe the harness is connected to a heating element inside the thermostat that causes it to open early for some reason, I think I read that somewhere .

Also, I've read on different forums that the two wires that connect to the thermostat have caused alot of engine fires in M62 equipped BMWs when they lose their plastic shielding and either connect to each other or become grounded to the motor, which is why some people leave them disconnected and wrap them up individually with black tape. So that's something else to look out for.
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