YOUYIEN Aluminum Thermostat Housing Assembly Kit for Chevy 1.8L — Includes Throttle Body Inlet Heater Pipe & Gasket

YOUYIEN's all-aluminum engine coolant thermostat housing assembly kit replaces worn plastic outlets and includes the throttle body inlet heater pipe and sensor gasket for Chevy 1.8L models.

This complete replacement kit is built to match common OEM fitments for 1.8L GM four-cylinder engines used in Chevy Cruze (2011–2016, limited 2016), Chevy Sonic (2012–2018) and Chevy Trax (2013–2020). Designed from corrosion-resistant aluminum, the assembly aims to reduce warping and leaks that are common with aging plastic housings. The package contains the thermostat housing, throttle body inlet heater pipe and a sensor gasket so you get the essential pieces for a direct-fit repair.

Will this thermostat housing fit my Chevy 1.8L?

Compatibility covers multiple model years and common OEM part numbers; always cross-check your vehicle’s part pictures and numbers before ordering to avoid buying the wrong part. The YOUYIEN kit is intended as a direct replacement for several GM part numbers listed below.

• Fits: Chevy Cruze 1.8L (2011–2016), Cruze Limited 1.8L (2016)
• Also fits: Chevy Sonic 1.8L (2012–2018) and Chevy Trax 1.8L (2013–2020)
• Replaces water outlet numbers: 25192228, 55564890, 55577284, 15-81816, 902-033, 55579951, 96984103
• Replaces throttle body inlet heater pipe: 25192904, 55569809

What are the main benefits of an aluminum housing versus plastic?

The YOUYIEN housing uses high-grade aluminum for improved thermal stability and mechanical strength compared with many OEM plastic units. Aluminum resists the deformation that can occur under repeated temperature cycles and is less likely to crack or leak over time.

• Greater crush and heat resistance than plastic housings
• Reduced risk of warping and coolant leakage at high temperatures
• Durable mating surfaces help preserve sensor and hose seals
• Manufactured to meet OEM-style fit and function expectations

What’s included in the package and what should I prepare for installation?

The kit contains the main aluminum thermostat housing assembly, the throttle body inlet heater pipe and a sensor gasket so you won’t need to hunt for matching parts. To install, you’ll generally need basic hand tools, new coolant, and time to properly bleed the cooling system after the repair.

• Included: 1x aluminum thermostat housing assembly
• Included: 1x throttle body inlet heater pipe
• Included: 1x sensor gasket
• Recommended: inspect hoses, thermostat, and clamps; replace coolant and torque bolts to spec

How durable is this replacement part and are there fitment caveats?

YOUYIEN’s all-aluminum construction is intended to improve long-term durability versus brittle plastics, but correct part selection and proper installation are essential for performance. Confirm visual match and OEM numbers on your existing parts before purchasing; differences in turbo or heater configurations on certain variants may require other parts.

• Aluminum construction reduces leak and warp potential
• Tested to meet OEM-style quality expectations
• Verify part numbers and images to prevent wrong purchases
• Installation may require coolant replacement and bleeding

Who is this for: This YOUYIEN thermostat housing assembly kit is aimed at DIY mechanics, independent shops and fleet owners who need a rugged, direct-fit replacement for 1.8L GM engines in Cruze, Sonic and Trax models. Choose this kit if your current housing shows cracks, leaks, or deformation, or if you prefer an aluminum replacement to avoid repeat failures from aging plastic outlets. Always confirm fitment with your vehicle’s part numbers and engine configuration before ordering.