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Old 01-08-2013, 10:19 AM
7Rage 7Rage is offline
Officially Welcomed to the 'Fest
Location: Long Beach, CA
Join Date: May 2012
Posts: 183
Mein Auto: 2007 750Li
I cant see there being a sensor that detects a special compund or ingredient in the coolant so the car can tell if it bmw or other brand.... if there is tho, jeez..

and if you dont have a leak... then you are low maybe because there is air in the system? and it appeared full but when turned on the air went to the radiator..

My question is why does it keep getting low....

try filling is with distilled water... that way you arent putting the wrong antifreze in and damaging anything.. plus its probably cheaper...

If it is full still then bad sensor seems probable...

or you can just go to the dealer
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