Thread: Which one is the coolant reservoir cap, and what is the other one????
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      11-25-2017, 01:15 PM   #57
BDWonder
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Drives: 2016 M5
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Originally Posted by E90Fleet View Post
Glad you are fixed up
Hey...so what are these 2 reservoirs actually filled with? Same liquid coolant? Or does the left and right reservoir use different liquids?
Thanks dude.
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