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7 Series - E65 / E66 (2002 - 2008)
Discussion of BMW's 4th generation E65/E66 7 Series flagship. The E65 generated much controversy, due to its radical styling and iDrive user difficulties. Nonetheless, the E65 broke records to become the best-selling 7-series iteration ever, especially after its 2005 facelift.

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Old 01-06-2013, 12:39 PM
Mr.750 Mr.750 is offline
A BMW, 7 Series of course
Location: Mt. Auburn, IA
Join Date: Jul 2012
Posts: 513
Mein Auto: LS460
Well... That was not a good idea..

Alright so a few weeks ago my car was running low on anti-freeze and not knowing BMW made special anti-freeze, just filled my car full of John Deere tractor anti-freeze. Now a few weeks later the computer is telling me my anti-freeze level is low so I called and found out it takes a special kind. So my question is what should I do? Should I stop driving the car and order some BMW to put in it when the anti-freeze comes? Should I drain it then re-fill it with BMW anti-freeze? Should I continue putting John Deere anti-freeze in it? Any advice would be appreciated. Thanks!
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Old 01-06-2013, 01:06 PM
llando88 llando88 is offline
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Location: On The Move
Join Date: Jul 2003
Posts: 14,818
Mein Auto: Ram 2500 4x4
Woah. No idea what tractor anti freeze is composed of. Google search?

Anyways, does the 7er have an expantion tank? Might be idea to drain that, then refill, then idle the car. If you did that three times, seems like most of it would be gone?

But yeah, no idea what that stuff would do. If it were mine, I'd get it replaced.
“Character is doing the right thing when nobody’s looking. There are too many people who think that the only thing that’s right is to get by, and the only thing that’s wrong is to get caught.”

- J.C. Watts Jr.
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Old 01-06-2013, 02:24 PM
M4XBMW7's Avatar
M4XBMW7 M4XBMW7 is offline
Location: Atlanta
Join Date: Nov 2011
Posts: 962
Mein Auto: F02 (750Li)
Yah these cars are very sensitive and do require their own antifreeze , what i would do if i was you , would be taking it in for a coolant service by a BMW dealer , $200 bucks they will flush and clean all the contamination ( if there is any ) etc and let you know if there's anything wrong . Just my .2c
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Old 01-06-2013, 05:53 PM
KaileSvick KaileSvick is offline
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Location: Tampa, FL
Join Date: Sep 2012
Posts: 378
Mein Auto: 2003 BMW 745Li
You may possibly have a bad coolant level sensor. To my knowledge its just a float in the expansion tank that measure coolant levels. Or you may just be low. My .02
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Old 01-08-2013, 10:19 AM
7Rage 7Rage is offline
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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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