Coolant leaking!

f32pham · 08-24-2021, 04:32 AM

Hi all. 2017 440i B58.

I have a minor coolant leak under the car. Has someone dealt with something similar to this? It begins to leak from the top then down towards the oil drain plug. I cannot pin point where its coming from however.

cfm56d7b · 08-24-2021, 11:48 AM

Was the main reservoir cap ever replaced?

Please take a look if there is white residue under the main reservoir cap. If there is - replace it. Mine was replaced (it's a known issue).

08-24-2021, 04:32 AM	#1
f32pham Registered 0 Rep 1 Posts Drives: 2017 440i Join Date: Aug 2021 Location: San Diego iTrader: (0)	Coolant leaking! Hi all. 2017 440i B58. I have a minor coolant leak under the car. Has someone dealt with something similar to this? It begins to leak from the top then down towards the oil drain plug. I cannot pin point where its coming from however. Last edited by f32pham; 08-24-2021 at 04:35 AM.. Reason: added wording
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08-24-2021, 11:48 AM	#2
cfm56d7b Lieutenant General 5876 Rep 10,250 Posts Drives: 2017 440i Gran Coupe & 2015 X5 Join Date: Nov 2012 Location: Orange County, CA iTrader: (2)	Was the main reservoir cap ever replaced? Please take a look if there is white residue under the main reservoir cap. If there is - replace it. Mine was replaced (it's a known issue).
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