Stant 13389 Engine Coolant Thermostat

OE Type Thermostat for Mazda and GM Applications

The Stant 13389 engine coolant thermostat is an OE Type Thermostat built to match original equipment design requirements. It uses a durable material construction and a stainless steel assembly for smooth, consistent operation in the cooling system. With a 195 degree opening temperature, this thermostat supports proper engine warm-up and temperature control in a range of Mazda and Chevrolet/Pontiac applications.

Key Features

• OE Type Thermostat designed to follow original equipment style and function
• 195 degrees F temperature rating for factory-style cooling system operation
• Durable material construction for long service life
• Stainless steel assembly engineered for smooth performance
• Flange diameter: 1.81 in.
• Height from flange to bottom: 0.82 in.
• Height from flange to top of bridge: 0.87 in.
• Stant 13389 for direct part identification during service and replacement

Product Details

Stant OE Type Thermostat 13389 is built for drivers and technicians who need a replacement engine coolant thermostat that follows OE design standards. The 195 degree calibration helps maintain the engine at its intended operating temperature, which is important for consistent heater performance, fuel control, and cooling system regulation. This part number is used across select Mazda CX-3, CX-5, CX-9, and MX-5 Miata models, as well as Chevrolet Chevette, Pontiac Acadian, and Pontiac T1000 applications. Stant 13389 is also referenced in replacement listings as superseded by 13789 for certain applications.

This part cross-references 13789 for the same application.

What It Helps Address

• Engine running too cool or taking too long to reach operating temperature
• Temperature fluctuations caused by a worn thermostat
• Weak cabin heat from delayed coolant warm-up
• Cooling system service needs on Mazda CX-3, CX-5, CX-9, and MX-5 Miata models
• Replacement needs on Chevrolet Chevette, Pontiac Acadian, and Pontiac T1000 vehicles

Installation Notes and Tips

Verify the thermostat temperature rating, flange dimensions, and housing style before installation. Clean the sealing surfaces thoroughly and inspect the cooling system for contamination, gasket residue, or coolant condition issues that could affect performance. Confirm vehicle application by year, make, and model before ordering Stant 13389.

Quality Assurance

Stant OE Type Thermostat products are built around original equipment design principles and stainless steel assembly construction for consistent cooling system operation. The durable material construction supports long-term service in normal engine cooling conditions.