[reijimaho]

I just refilled the coolant about a month ago. Today, I checked the coolant level and found it below the 'Min' arrow.
Is this normal or is there something wrong with the coolant system?
My car is a 2015 BMW 328i F30 with an N20 engine, with approximately 91,164 miles.

[eff32fl]

If it's below the min level then your coolant is low. If it's under just a bit it's not a huge deal but there's a small coolant leak somewhere. I recently had to replace my coolant reservoir cap it was letting coolant evaporate. I'd check that first and if that's not the issue I'd recommend having a shop do a pressure test.

[sspade]

Put it back to the halfway point of reservoir and keep an eye on it (as you have been).

One of my turbo seals is leaking slightly and has me dealing with the same issue as you. I’ve driven it like this for at least 40k miles so far... with no intention of pulling the turbo until Im ready for a full rebuild (which I already have on the shelf). I’m only needing to top up monthly with is far from a hassle, at this point. Hasn’t gotten any worse.

[reijimaho]

Originally Posted by eff32fl

If it's below the min level then your coolant is low. If it's under just a bit it's not a huge deal but there's a small coolant leak somewhere. I recently had to replace my coolant reservoir cap it was letting coolant evaporate. I'd check that first and if that's not the issue I'd recommend having a shop do a pressure test.

Thank you, I will go to the shop later.

Originally Posted by sspade

Put it back to the halfway point of reservoir and keep an eye on it (as you have been).

One of my turbo seals is leaking slightly and has me dealing with the same issue as you. I’ve driven it like this for at least 40k miles so far... with no intention of pulling the turbo until Im ready for a full rebuild (which I already have on the shelf). I’m only needing to top up monthly with is far from a hassle, at this point. Hasn’t gotten any worse.

Thank you, How did you know that your turbo seal was leaked?