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      07-20-2020, 04:19 PM   #19
ambletx
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Drives: 2021 M5 Comp
Join Date: Oct 2017
Location: Austin, TX

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Just got a call from my SA, and this is the weirdest issue I have ever heard of. So bear with me on this, because even she was confused by what BMWNA's answer was. So here goes...

There is a certain chemical compound in the coolant which can have a reaction with the parts in the car's coolant system. This is a rare case, but has been seen before where once the reaction occurs it causes it to overflow. This overflow was getting on the coil causing cylinder #3 to misfire. They are waiting on BMWNA to tell them what parts need to be replaced to resolve this issue.
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