Service fluidsVerified Oct 2, 2026
Engine coolant
Toyota Super Long Life Coolant · 5.0 L reference capacityNHP170G hybrid engine cooling circuit.
Toyota Motor Corporation source ↗Exact-code service & fitment
Toyota Sienta NHP170G: Coolant, cooling-system service & fitment
Keep engine and hybrid/power-electronics cooling circuits separate and tied to the exact vehicle evidence.
2verified facts
2fitment references
1service references
0step-by-step guides
Before you buy or service: Cooling systems may be pressurized and hybrid vehicles can have multiple circuits. Follow the manufacturer procedure and never open a hot pressurized system.
Identify the engine and inverter loops
Toyota lists separate engine coolant and hybrid inverter coolant capacities for the NHP170G. They are different systems; consult the matching manual before diagnosis or service.
Cooling capacities are not drain/refill instructions, and hot or high-voltage systems are hazardous.
Exact answers
2 source-backedSpecifications & capacities
Purchase-adjacent reference
2 exact referencesParts & fitment
Service fluidsVerified Oct 2, 2026
Inverter coolant
Toyota Super Long Life Coolant · 1.8 L reference capacitySeparate hybrid inverter cooling circuit.
Toyota Motor Corporation source ↗Manufacturer-backed service
1 documentedMaintenance & repair references
fluidsCondition based
Engine and inverter coolant service
Use Toyota Super Long Life Coolant; reference capacities are 5.0 L for the gasoline engine circuit and 1.8 L for the inverter circuit.
No replacement interval is inferred from the specification table.
Toyota Japan Sienta Hybrid 2020 owner manual ↗Keep the exact code
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