2026-07-21 · 4 min read
Toyota Sienta Coolant Malaysia
Toyota Sienta Coolant guide and repair information for Malaysia owners.
Toyota SLLC (pink OAT) — change every 4 years or 60,000 km. NHP170 hybrid has dual cooling circuits (engine + inverter). NCP175 petrol has single circuit. Check level every 10,000 km as 1NZ engines can develop minor coolant leaks at higher mileage.
Coolant Service
- NCP175 coolant flush
- NHP170 dual circuit flush — do both circuits together