MILIPARTS Aluminum Thermostat Housing Assembly for Chevrolet Cruze Sonic Trax 1.6L/1.8L with Temperature Sensor

MILIPARTS' aluminum thermostat housing assembly is a direct-fit replacement that restores coolant flow and temperature sensing for select 2011–2020 Chevrolet Cruze, Sonic, and Trax models.

When an aging or cracked thermostat housing causes coolant leaks, overheating warnings, or erratic temperature readings, replacing the OEM plastic unit with a durable aluminum assembly is a fast way to regain reliable engine cooling performance. This MILIPARTS kit ships with the aluminum housing and a matching water temperature sensor, and it replaces several OE part numbers so you can confirm fit before ordering.

Which vehicles and engines will this thermostat housing fit?

This assembly is built for GM four-cylinder applications and fits specified model years and engine sizes. Verify your vehicle’s year and engine displacement (1.6L or 1.8L) against the fit list to ensure proper compatibility.

• Compatible models: Chevrolet Cruze (2011–2016, plus 2016 Cruze Limited), Sonic (2012–2018), Trax (2013–2020).
• Engine types: Designed for 1.6L and 1.8L gasoline engines used in these models.
• OE cross-references: Replaces part numbers 25192228, 55564890, 55577284, 15-81816, 902-033, 55579951, 96984103.

What comes in the MILIPARTS thermostat housing kit?

The kit includes everything needed to replace the housing and temperature sensing component, reducing the chance of missing pieces during install. Check the package before starting the job and review any vehicle-specific gaskets or O-rings you might need separately.

• One aluminum coolant thermostat housing assembly built to OEM mounting points.
• One water temperature sensor pre-matched to the housing for plug-and-play installation.
• Packaging designed to protect machined surfaces during shipping.

How does the aluminum construction benefit durability and performance?

Aluminum resists the cracking and deformation that can affect plastic housings over time, especially under heat cycling and exposure to coolant chemicals. That improved material stability lowers the chance of coolant leaks and helps maintain correct thermostat operation over a longer service life.

• More resistant to heat stress and pressure than many factory plastic housings.
• Precision-machined mating surfaces for better sealing and reduced leak risk.
• Corrosion-resistant finish for extended service in cooling-system environments.

How easy is it to install and what should I check during replacement?

Installation is straightforward for experienced DIYers or professional mechanics familiar with GM cooling systems. Use proper torque on fasteners, replace any damaged gaskets or hoses, and bleed the cooling system according to manufacturer procedures to avoid air pockets.

• Confirm vehicle fit and engine size before beginning work.
• Drain coolant to below the housing, then remove mounting bolts and sensor wiring harness carefully.
• Inspect and replace gaskets or O-rings as needed; refill and bleed the cooling system after installation.

Who is this for: This MILIPARTS aluminum thermostat housing assembly is aimed at Chevrolet owners and independent repair shops seeking a more durable replacement for failing OEM housings on Cruze, Sonic, and Trax vehicles with 1.6L or 1.8L engines. It’s also appropriate for anyone performing routine cooling-system maintenance who prefers a longer-lasting metal component and a kit that includes the temperature sensor.