MNJWS Thermostat Housing Assembly for Chevy 1.6L/1.8L - Pre‑assembled with Sensor & Gasket, Direct Fit

MNJWS Thermostat Housing Assembly is a complete drop-in replacement that combines the thermostat, temperature sensor, and gasket into one unit engineered for 1.6L and 1.8L Chevrolet Ecotec engines.

This assembly is built to directly replace worn or leaking thermostat housings on many Chevy small-engine models from 2011–2018. It matches OEM fitment and mounting points while including the sensor and seal you need to restore proper coolant circulation and temperature feedback. The unit is supplied with a 12-month warranty and is offered as a cost-effective alternative to OE aftermarket parts.

What vehicles and engines is this compatible with?

Designed specifically for GM’s 1.6L and 1.8L Ecotec engines, this thermostat housing fits a range of Chevrolet models. Check engine displacement and model years to confirm fit before ordering.

• 2011–2016 Chevrolet Cruze 1.8L and 2016 Cruze Limited 1.8L
• 2012–2018 Chevrolet Sonic 1.6L / 1.8L
• 2013–2018 Chevrolet Trax 1.8L
• Replaces GM part numbers 25192228, 55564890, 55577284, 55579951, 96984103

Does this replace branded OE parts like ACDelco or Dorman?

Yes — the MNJWS housing is manufactured to match the form, fit, and mounting of common OE replacements. It’s not a GM, ACDelco, or Dorman-branded component, but it is intended to be a direct-fit substitute for those part numbers.

• Cross-replaces ACDelco 15-81816 and Dorman 902-033
• Designed to align with OEM mounting points and hose connections
• Includes sensor and gasket so no additional parts are required for installation

What problems does replacing the thermostat housing solve?

Changing a damaged or leaking housing restores coolant routing and improves temperature sensor readings that the engine control system relies on. Replacing the assembly can stop coolant loss, reduce the risk of overheating, and prevent diagnostic trouble codes related to thermostat circuitry or temperature sensors.

• Stops coolant leaks at the housing seal and mating surfaces
• Restores accurate temperature feedback with the included sensor
• Reduces risk of engine overheating due to stuck or failed thermostats

How easy is it to install this thermostat housing yourself?

The unit is engineered for straightforward replacement using common hand tools; many DIYers can complete the swap in one afternoon. Because the thermostat, sensor, and gasket arrive pre-assembled, reinstallation typically involves draining some coolant, unbolting the old housing, and refitting the new assembly with the correct torque values.

• Pre-assembled thermostat, sensor, and gasket for faster replacement
• Direct-fit design reduces modification or extra parts
• Includes a 12-month limited warranty for peace of mind

Who is this for? This MNJWS thermostat housing assembly is aimed at vehicle owners, home mechanics, and independent repair shops working on Chevrolet Cruze, Sonic, or Trax models with 1.6L or 1.8L Ecotec engines who need a reliable, ready-to-install replacement. It suits drivers seeing coolant leaks, erratic temperature readings, or specific thermostat-related fault codes and those wanting an affordable, OEM-compatible substitute without buying a branded OE unit. Always verify your vehicle’s engine size and part numbers before purchase to ensure proper compatibility.