Lexus NX350 2022 Owner's Manual page 667

4 Check that the coolant level is between the [FULL] and [LOW] lines on the
reservoir.
Engine
▶
Intercooler (NX350 only)
▶
5 Add coolant if necessary.
Water can be used in an emergency if coolant is unavailable.
9-12. Items to check before contacting a dealership
Radiator
A
Cooling fan
B
Reservoir
A
[FULL] line
B
[LOW] line
C
Radiator cap
D
Reservoir
A
[FULL] line
B
[LOW] line
C
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