Lexus RX450H Manual page 519

4-3. Do-it-yourself maintenance
CAUTION

When the engine and hybrid system are hot
Do not remove the coolant reservoir cap.
The cooling system may be under pressure and may spray hot coolant if the
cap is removed, causing serious injuries, such as burns.
NOTICE

When adding coolant
Coolant is neither plain water nor straight antifreeze. The correct mixture of
water and antifreeze must be used to provide proper lubrication, corrosion
protection and cooling. Be sure to read the antifreeze or coolant label.

If you spill coolant
Be sure to wash it off with water to prevent damage to parts or paint.
Radiator and condenser
Check the radiator and condenser and clear away any foreign
objects.
If any of the above parts are extremely dirty or you are not sure of
their condition, have your vehicle checked by any authorized
Lexus dealer or repairer, or another duly qualified and equipped
professional.
CAUTION

When the hybrid system is hot
Do not touch the radiator or condenser as they may be hot and cause serious
injuries, such as burns.
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