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      10-20-2019, 01:51 AM   #116
CoolWave911
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Drives: 2017 BMW G30 530i M Sport
Join Date: Oct 2019
Location: Sydney, NSW Australia

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Quote:
Originally Posted by steve090619 View Post
I have an early 2017 build. Add coolant twice, both after 13500 miles. My previous 535 I also had to add coolant every 15k miles.
If you have to add coolant more than once and it felt like a pattern then chances are you're up for a leak similar to mine later on.

I pretty much accelerated this to a point where that tiny leak developed into a crack and it started to drip in puddles. Pressure test indicated a leaked expansion tank and it was replaced under warranty.

I filled my coolant almost 8 times already if I'm not wrong
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