Coolant used in Toyota «Toyota Super Long Life Coolant» filled in at the factory. Be sure to use coolant to rule out technical problems «Toyota Super Long Life Coolant» (Toyota Ultra Long Life Coolant) or equivalent high quality, silicate, amine, nitrite and borate free ethylene glycol type fluid formulated with long life hybrid organic acid technology (long life hybrid organic acid coolant is a combination of organic acids with a low phosphate content).