2026-10-08 · 5 min read
Nissan Navara Thermostat Malaysia — YD25DDTi
YD25 thermostat opens at 82°C. A stuck-open thermostat causes the engine to run cold, reducing efficiency and increasing emissions. A stuck-closed thermostat causes dangerous overheating. Symptoms of thermostat failure: temp gauge not reaching normal, or climbing too high. Replace the thermostat every 80,000 km or when coolant is changed as preventive maintenance.
Navara Thermostat Service
- Replace at 80,000 km or if temperature gauge reads abnormally
- Stuck open = never reaches operating temp, poor fuel economy and heater output
- Stuck closed = rapid overheating — do not drive, tow to workshop
- Use OEM Nissan thermostat — cheap units fail quickly in Malaysian climate