2019 Subaru Impreza Thermostats – Engineered for Accurate Temperature Regulation

Impreza Thermostats 2019 – Reliable Cooling Starts with OEM Precision

Your 2019 Subaru Impreza’s cooling system relies on a properly functioning thermostat to regulate engine temperature. When the thermostat fails—sticking open or closed—it can lead to engine overheating, poor cabin heat, or inefficient fuel consumption.

OEM thermostats are calibrated to Subaru’s factory temperature settings, ensuring your engine reaches and maintains optimal operating temperature efficiently. Built with high-quality materials and a durable seal, these thermostats offer consistent performance and a perfect fit—unlike many aftermarket versions that may compromise response time or longevity.

Whether you're replacing a failed unit or performing preventative maintenance, genuine OEM thermostats help safeguard your engine from thermal stress.

Why Choose OEM Thermostats? 

✔ OEM Fitment – Designed for factory specifications to ensure precise performance. 

✔ Prevents Failures – Maintains optimal operation and longevity. 

✔ Durable Construction – Made from high-quality, corrosion-resistant materials. 

✔ Efficient Operation – Ensures proper function and system protection. 

✔ Easy Installation – Direct bolt-on replacement with no modifications required.

Compatible Subaru Impreza Trims This OEM thermostat is compatible with:

• Impreza Base

• Impreza Premium

• Impreza Sport

• Impreza Limited

• 2.0i AWD sedan and 5-door models

Always verify fitment using your VIN or OE part number, as some engine variants may require specific thermostat designs or housing assemblies.

Symptoms of a Failing Thermostat in Your 2019 Impreza 

🌡️ Fluctuating temperature gauge readings 

🌡️ Cabin heater blowing cold air 

🌡️ Engine overheating or slow warm-up 

🌡️ Coolant leaks near the thermostat housing 

🌡️ Poor fuel efficiency and performance

Replacing a faulty thermostat early prevents serious engine damage and restores proper heating and cooling function.

How to Replace a Thermostat on a 2019 Impreza This is a moderate repair for experienced DIYers. Coolant draining and system bleeding are required.

Tools & Materials Needed: 

✔ Socket and ratchet set 

✔ OEM thermostat and gasket or seal 

✔ Drain pan 

✔ Fresh Subaru-compatible coolant

✔ Gasket scraper (if needed) 

✔ Torque wrench 

✔ Funnel and bleeder tool (optional)

Steps Overview:

1. Allow engine to cool fully, then drain coolant.

2. Remove the thermostat housing and take out the old thermostat.

3. Clean gasket surfaces and install the new thermostat.

4. Reassemble the housing and refill coolant.

5. Bleed the system to remove air pockets and test for leaks.

Popular Related Parts for 2019 Subaru Impreza 

🔧 2019 Impreza Radiator – Ensure clean coolant flow during thermostat replacement 

🔧 2019 Impreza Water Pump – Check for leaks or play during cooling system service 

🔧 2019 Impreza Radiator Hoses – Replace aging hoses to prevent coolant leaks 

🔧 2019 Impreza Temperature Sensors – Monitor engine temp accurately for ECU control 

🔧 Subaru OEM Coolant – Prevents corrosion and maintains proper cooling system pressure

Get OEM 2019 Impreza Thermostats Today! Don’t leave your cooling system to chance. Install a genuine OEM thermostat and ensure long-term engine health, fuel efficiency, and comfort.

🛒 Stay Cool – Shop OEM Thermostats Now

FAQs About 2019 Subaru Impreza Thermostats

❓ How long do OEM thermostats typically last? Most last 100,000 km or more, but should be inspected during coolant service intervals.

❓ Can a thermostat be stuck open? Yes. This prevents the engine from warming up properly, reducing efficiency and cabin heat.

❓ What happens if it’s stuck closed? Coolant flow stops, causing rapid overheating and potential engine damage.

❓ Should I flush coolant when replacing the thermostat? It’s recommended, especially if coolant is dirty or nearing its service life.

❓ Are OEM thermostats better than aftermarket ones? Yes. OEM thermostats offer exact calibration, longer durability, and a guaranteed fit.