Nissan Sentra Thermostat Location
Find exactly where the thermostat is located on your Sentra. Includes replacement tips and common symptoms.
⚡ Quick Answer: Where Is The Thermostat?
In most Nissan Sentras, the thermostat is located where the radiator hose connects to the engine.
Follow the upper or lower radiator hose to the engine - the thermostat is inside the housing at that connection point.
🔧 Thermostat Location by Generation
| Years | Location | Difficulty | Time | Shop |
|---|---|---|---|---|
| 2000-2006 | Lower radiator hose, front of engine | Easy | 45-60 min | Find Part |
| 2007-2012 | Under intake manifold, driver side of engine | Moderate | 1-2 hours | Find Part |
| 2013-2019 | Integrated in water outlet housing, front of engine | Easy-Moderate | 45-90 min | Find Part |
| 2020-2024 | Water outlet housing, front right of engine | Moderate | 1-1.5 hours | Find Part |
🚨 Bad Thermostat Symptoms
Engine overheating
Thermostat stuck closed, coolant can't flow
Heater blows cold
Thermostat stuck open, engine never reaches temp
Temp gauge fluctuates
Thermostat opening/closing erratically
Poor fuel economy
Engine running too cold (stuck open)
Check engine light (P0128)
Coolant temp below thermostat regulating temperature
📍 Detailed Location By Year
B15 (5th Gen)
2000-2006 • 1.8L QG18DE, 2.5L QR25DE (SE-R)
Thermostat Location:
Lower radiator hose, front of engine
How to Access:
From above, follow lower radiator hose to engine
💡 Drain coolant first. Located in thermostat housing at end of lower hose.
B16 (6th Gen)
2007-2012 • 2.0L MR20DE, 2.5L QR25DE (SE-R)
Thermostat Location:
Under intake manifold, driver side of engine
How to Access:
Follow upper radiator hose to engine block
💡 May need to remove air intake for better access. Drain coolant before starting.
B17 (7th Gen)
2013-2019 • 1.8L MRA8DE, 1.6L Turbo (NISMO)
Thermostat Location:
Integrated in water outlet housing, front of engine
How to Access:
Follow upper radiator hose to thermostat housing
💡 Some models have thermostat integrated with housing - may need to replace entire unit.
B18 (8th Gen)
2020-2024 • 2.0L MR20DD
Thermostat Location:
Water outlet housing, front right of engine
How to Access:
Visible from top, follow upper hose
💡 Tight space in modern engine bay. Consider a mirror or inspection camera.
📋 Replacement Steps Overview
Let engine cool - Never open cooling system when hot!
Drain coolant - Open drain valve or disconnect lower hose
Remove thermostat housing - Usually 2-3 bolts (10mm or 12mm)
Replace thermostat + gasket - Note orientation (spring goes toward engine)
Refill & bleed coolant - Run engine with heater on, watch for bubbles
⭐ Recommended Thermostats
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