2010 Lexus RX 450h User Guide 2 - Page 479
2010 Lexus RX 450h Manual
Page 479 highlights
4-3. Do-it-yourself maintenance Power control unit coolant reservoir Reservoir cap "FULL" line "LOW" line If the level is on or below the "LOW" line, add coolant up to the "FULL" line. (→P. 634) n Coolant selection Only use "Toyota Super Long Life Coolant" or similar high quality ethylene glycol based non-silicate, non-amine, non-nitrite, and non-borate coolant with long-life hybrid organic acid technology. U.S.A.: "Toyota Super Long Life Coolant" is a mixture of 50% coolant and 50% deionized water. (Minimum temperature: -31°F [-35°C]) Canada: "Toyota Super Long Life Coolant" is a mixture of 55% coolant and 45% deionized water. (Minimum temperature: -44°F [-42°C]) For more details about coolant, contact your Lexus dealer. n If the coolant level drops within a short time of replenishing Visually check the radiators, hoses, engine/power control unit coolant reservoir caps, drain cock and water pump. If you cannot find a leak, have your Lexus dealer test the cap and check for leaks in the cooling systems. 484