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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 04-28-2016, 02:45 PM
blazen244 blazen244 is offline
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Location: Maryland
Join Date: Jun 2014
Posts: 23
Mein Auto: 2008 750 Li

How often are you adding coolant? I've had the car for two years now and it has been serviced by the dealer since I've had it so I haven't had to deal with it. Today I got in the car started it and the low coolant light came on so I drove it to pick up my kid and after I restarted it the light went away so I picked some up anyway. After letting it cool I checked it then added about 8oz. or so but this was the first time I've seen this. I constantly check the ground for all of my vehicles for wet spots under them and I haven't seen anything nor have I smelled anything from it.I'm just curious to know how often do you add coolant?

Last edited by blazen244; 04-28-2016 at 03:31 PM.
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Old 04-30-2016, 04:18 AM
TechFreak TechFreak is offline
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Location: Scotland
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Mein Auto: AC Schnitzer 745i Sport
If it's a very low leak then your won't see any on the ground as it collects in the big plastic undertray fixed to the underside of the engine then evaporates.

Also read this thread :


Last edited by TechFreak; 04-30-2016 at 04:22 AM.
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Old 04-30-2016, 04:46 AM
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Rick in Yuma Rick in Yuma is offline
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Location: Arizona
Join Date: Dec 2006
Posts: 1,440
Mein Auto: 05' 760li,94' H1,08'Smart
Here's another area that leaks. That you may not see on the ground . Until the leak gets really bad. The rear engine cover plate. The crossover pipe is also mentioned.

Get the car up off the ground, pull the lower panels. And inspect the lower part of the engine, between the engine and the transmission. If it's wet than you found it.

Part number five in the following diagram.
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Old 04-30-2016, 05:42 AM
xavier3002 xavier3002 is offline
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Location: tulsa,ok
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Mein Auto: equinox,benz 430, expy
Same thing happned to me and I found out my leak had something to do with a valley pan. And while finding that out, my CCVS were bad. Vaccum pump was bad, needed spark plugs(knew that), alternator bracket leak, and TCC also needed to be replaced. And it all costed me $3,200.
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Old 05-01-2016, 08:58 PM
blazen244 blazen244 is offline
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Location: Maryland
Join Date: Jun 2014
Posts: 23
Mein Auto: 2008 750 Li
Thanks guys for the info, it has to go back to the dealer soon for the annual check up and they'll do a once over hopefully they find something. They've been pretty good so far this is the 2nd dealer I've taken it to the first were robbers. the first dealership did 3800.00 dollars of work and still charged a diag fee and oh BTW left the power steering reservoir low
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Old 05-02-2016, 08:47 PM
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csmeance csmeance is offline
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Mein Auto: 760Li
common issue is the tank cracks and spews coolant when the system is pressurized.

2013 TL Advance 3.5L

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