u/RZ_Selected

So my 440i is at 67k miles now and i got the low coolant warning for the first time.

When i checked i had to refill 600ml to hit max again.

I topped it off yesterday evening. This morning i checked and it was slightly below max again.

But the engine bay i super dry, not a single wet spot to find. I changed the reservoir cap aswell yesterday when i filled it up. But the old cap looke fine.

Doesnt seem like im burning any coolant either. Exhaust seems normal.

Can this be normal to an extend ? Can a little fluctation occur from outside temps maybe ?