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E63 / E64 6 Series (2004 - 2010)
The E63/E64 BMW 6 Series builds on BMW's sporty heritage with aggressive lines and an incredible motor to back the design up. Available in coupe and convertible trims with a standard 4.8 liter engine producing 360 horsepower and 360 lb-ft of torque, the 6-series is a popular choice that exceeds expectations.

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Old 04-17-2013, 11:10 AM
alex1985 alex1985 is offline
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Location: edinburgh
Join Date: Apr 2013
Posts: 1
Mein Auto: 645ci
Question Hello

Anyone know where is the cooling thermostat in 645ci 2004???
I cant find the place where is located !
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Old 04-17-2013, 12:16 PM
sick645ci sick645ci is offline
Registered User
Location: UK
Join Date: Mar 2013
Posts: 26
Mein Auto: 645Ci
Hi. It is bolted onto the waterpump:


Realoem is a great site for parts diagrams.

Last edited by sick645ci; 04-17-2013 at 12:32 PM.
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Old 04-17-2013, 06:30 PM
HerbP HerbP is offline
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Location: Georgia
Join Date: Jul 2009
Posts: 5,175
Mein Auto: 2005 645Ci & 2007 750Li
Follow your top radiator hose, to the engine. It has 3 bolts that will need to be removed. I believe it is a dealer item only?
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