Antifreeze OEM Mazda or OEM Volkswagen

This is normal. Mazda master tech. I work on these everyday. Every oil change they need to be topped off. The coolant evaporates from the bottle pretty quick.

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.

Usa el G12 de Volkswagen y no lo cambies por nada. ... No te vas a arrepentir

2023 VR6, noticed coolant low, I added the proper coolant and the dealer pressure tested during our service appointment.

You're not supposed to add tap water... distilled water is fine for emergencies, but always top up with coolant whenever possible

I always use g13 from the dealer mainly because they can void any warranty for repairs on your cooling system if they see there is not g13 in there (g13 is pink, other types are purple) and with a model that is known to have coolant system issues, i aint giving them the excuse to not fix something they should.

Only use modern Volkswagen G12evo coolant! This is required not optional, if you mix the wrong coolants you can create an acidic meta eating coolant mixture that will ruin your engine

I'm flushing our 14 Tiguan this weekend cause the coolant is nasty as hell.

My 2017 CX-9 and it has a coolant leak from the back of the block by the manifold and the shop I took it to said to take it to a dealer.

I noticed a coolant leak the other week and bang - this was the exact issue.