For Chevy Trax 2013-2021 L4 1.4L. For Buick Encore 2013-2021 L4 1.4L. For Chevy Sonic 2012-2020 L4 1.4L. 【Function】:This aluminum thermostat housing ensures that the engine operates within the appropriate temperature range, effectively preventing overheating or undercooling of the engine, saving energy, and extending the engine's service life.