Lexus RC350 Owner's Manual page 631

After the engine has cooled down sufficiently, inspect the hoses and radiator
3
core (radiator) for any leaks.
Radiator
1
Cooling fans
2
If a large amount of coolant leaks, immediately contact your Lexus dealer.
RC350/RC300

RC F

8-2. Steps to take in an emergency
RC200t

631
8