Hi everyone, looking for some advice from fellow MINI owners.

Car: MINI Countryman R60 (turbo)

I’ve noticed my coolant level is dropping faster than I expected.

Timeline:
- Over ~4 months of normal driving, coolant went from normal level down to near minimum.
- About a month ago (November), the engine warning light came on.
- Thermostat was replaced, and coolant was topped off afterward.
- Since then, I’ve driven about 1,000 miles.
- Now, less than one and half month later, the coolant level has dropped again noticeably.

What I’ve checked so far:
- No visible coolant leaks around the reservoir, hoses, or nearby components.
- No obvious residue or puddles under the car.
- Engine temperature seems normal while driving.

My questions:
1. Is this rate of coolant loss considered normal for a turbo MINI R60, especially over ~1,000 miles?
2. Could this be a slow/hidden leak that doesn’t leave visible traces?
3. Are there common R60 failure points I should specifically check (expansion tank, cap, water pump, turbo coolant lines, head gasket, etc.)?
4. Would a pressure test or dye test be the next logical step?

I’ve attached a photo of the coolant reservoir for reference.

Any insight or similar experiences would be really appreciated. Thanks!

Mini R60s coolant level dropping too fast, normal consumption or hidden leak?