LandCruiser Coolant Loss

Had similar with my old Volvo. Coolant light, but no mayo in the oil, no steam, nothing obvious. You checked for air pockets?

Air pockets in a closed system? How would that even happen?

Yeah, closed system. I know, right? But the workshop found some. Topped it off, bled the system, problem solved. Could be worth a look before chasing ghosts.

Workshop found a small leak, pressure tested and located it. Replaced a hose. 52€. Thanks for the air pocket tip, got me thinking along the right lines.