Antifreeze OEM BMW or OEM Volkswagen

I’m running 110k miles in my M40 X3. There was a coolant issue but other than that it’s been an excellent engine.

Not that low because I topped it off before it got to that point but yeah it’s normal for our cars. It should only be the initial settling though, top it off engine cold with vw g12 evo 50/50 or distilled water and keep an eye on it. It shouldn’t drop any more once topped off for a while anyway.

These tsi motors tend to run hotter then standard engines. I would top off the car (once cooled typically around a hour) open it up and take it to the line above minimum, that\u2019ll be your maximum. Watch it over the next few weeks. If it goes below minimum again, you have some sort of leak.

I use BMW coolant cause it's similar in price, so why not. Actuall,y a little cheaper cause my dealer does discounts

By “air intake reservoir tank”, I assume you mean it’s the coolant tank for the water-air charge cooler. We need to know what car to tell if the coolant is suitable. That “G30” on the front is the important bit.

Maybe I'm wrong, here, but that looks like rust to me.

Did the mech use green coolant, and not the factory VW red/pink/purple stuff? That would cause the cast iron short block to rust out in short order.

VW coolant doesn\u2019t play nice and will chemically react with parts store general coolant.

My 2029 Alltrack has developed the same problem at 50K miles. Drops about 1” for every two hours driven. You can see and smell the antifreeze.

330i, coolant repairs.

I see your reservoir says G13 mit Silikat. Would recommend getting rid of G13 and removing the bag. G13 causes corrosion (resulting in a leak at the shaft of the water pump), leaves deposits (clogging the heater core and resulting in engine overheating), etc. Flush the system a couple times with distilled water and then fill up with G12evo coolant which doesn\u2019t have these issues.