Mahle C33427 Engine Coolant Thermostat Housing Gasket
OE Quality 60-Day Returns
Mahle
 Engine Coolant Outlet Gasket

Mahle C33427 Engine Coolant Thermostat Housing Gasket

Brand Mahle C33427
Product line Engine Coolant Outlet Gasket
Fits Buick, Chevrolet, and GMC · 45 vehicles

OE-trusted sealing. Mahle gasket engineering is used by OEMs and technicians worldwide.

Direct replacement. Built for the engine coolant outlet and thermostat housing seal.

Cross-references General Motors 12649163 for the same application. See all 1.

$15.52Free shipping
In stock · usually ships same day before 1pm CST
Step 1 — Confirm fitment
Free return shipping if it doesn't fit when you check fitment here first.
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
Step 2 — Quantity
Order total $15.52
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.
Not what you need? See all Engine Coolant Thermostat Housing Gasket options

Engine coolant outlet gasket for GM applications

Mahle C33427 is an engine coolant thermostat housing gasket built for sealing the coolant outlet connection. It is listed for a range of Chevrolet, GMC, and Buick applications, including the Chevrolet Equinox, Malibu, and Spark, as well as the GMC Terrain and Buick Encore. The part number C33427 also cross-references General Motors 12649163 for the same application.

Key features

  • Engine coolant outlet gasket for sealing the thermostat housing connection
  • Mahle sealing product line for OEM and technician use
  • Steel construction noted in the fitment data
  • Direct application coverage for multiple Chevrolet, GMC, and Buick models
  • Part number C33427 for easy catalog matching

Detailed description

Mahle C33427 is a sealing component used at the engine coolant outlet and thermostat housing interface. It is specified across 2016-2024 GM compact and midsize vehicles, including the Chevrolet Equinox, Malibu, Spark, Cruze, and Volt, plus the GMC Terrain and Buick Encore. For buyers searching for a Chevrolet Equinox coolant outlet gasket, a GMC Terrain thermostat housing gasket, or a Buick Encore engine coolant outlet gasket, this part number provides a cataloged match for the listed applications.

Mahle’s gasket line is built around sealing performance for service work where coolant retention and joint integrity matter. The C33427 gasket is intended for applications that require a precise seal at the coolant outlet connection, helping maintain proper cooling system function and reduce leakage at the housing interface.

What it is used for

  • Coolant seepage at the thermostat housing or outlet joint
  • Loss of seal at the engine coolant outlet connection
  • Service replacement during cooling system repairs
  • Leak concerns after thermostat housing removal
  • Restoring a proper seal on listed GM applications

Installation notes and tips

Confirm the vehicle year, make, model, and engine-specific application before ordering. Clean the mating surfaces thoroughly before installation and inspect the housing for damage or warpage that could affect sealing. Use the fitment notes and the part number C33427 to verify the correct application for your Chevrolet, GMC, or Buick vehicle.

Quality assurance

Mahle gaskets are trusted by OEMs and technicians worldwide for sealing applications. This part cross-references General Motors 12649163 for the same application.

This part fits 45 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersNotes
2024ChevroletEquinox1.5LL4Steel; Engine Coolant Outlet Gasket
2024ChevroletMalibu1.5LL4Steel; Engine Coolant Outlet Gasket
2024GMCTerrain1.5LL4Steel; Engine Coolant Outlet Gasket
2023ChevroletEquinox1.5LL4Steel; Engine Coolant Outlet Gasket
2023ChevroletMalibu1.5LL4Steel; Engine Coolant Outlet Gasket
2023GMCTerrain1.5LL4Steel; Engine Coolant Outlet Gasket
2022BuickEncore1.4LL4Steel; Engine Coolant Outlet Gasket
2022ChevroletEquinox1.5LL4Steel; Engine Coolant Outlet Gasket
2022ChevroletMalibu1.5LL4Steel; Engine Coolant Outlet Gasket
2022ChevroletSpark1.4LL4Steel; Engine Coolant Outlet Gasket
2022ChevroletTrax1.4LL4Steel; Engine Coolant Outlet Gasket
2022GMCTerrain1.5LL4Steel; Engine Coolant Outlet Gasket
2021BuickEncore1.4LL4Steel; Engine Coolant Outlet Gasket
2021ChevroletEquinox1.5LL4Steel; Engine Coolant Outlet Gasket
2021ChevroletMalibu1.5LL4Steel; Engine Coolant Outlet Gasket
2021ChevroletSpark1.4LL4Steel; Engine Coolant Outlet Gasket
2021ChevroletTrax1.4LL4Steel; Engine Coolant Outlet Gasket
2021GMCTerrain1.5LL4Steel; Engine Coolant Outlet Gasket
2020ChevroletEquinox1.5LL4Steel; Engine Coolant Outlet Gasket
2020ChevroletMalibu1.5LL4Steel; Engine Coolant Outlet Gasket
2020ChevroletSpark1.4LL4Steel; Engine Coolant Outlet Gasket
2020GMCTerrain1.5LL4Steel; Engine Coolant Outlet Gasket
2019BuickEncore1.4LL4Fits various engine types and models for secure installation of Engine Cylinder Head Bolt Set.
2019ChevroletCruze1.4LL4Fits various engine types and models for secure installation of Engine Cylinder Head Bolt Set.
2019ChevroletEquinox1.5LL4Steel; Engine Coolant Outlet Gasket
2019ChevroletMalibu1.5LL4Steel; Engine Coolant Outlet Gasket
2019ChevroletSpark1.4LL4Steel; Engine Coolant Outlet Gasket
2019GMCTerrain1.5LL4Steel; Engine Coolant Outlet Gasket
2018BuickEncore1.4LL4Fits various engine types and models for secure installation of Engine Cylinder Head Bolt Set.
2018ChevroletCruze1.4LL4Fits various engine types and models for secure installation of Engine Cylinder Head Bolt Set.
2018ChevroletEquinox1.5LL4Fits various engine types and models for secure installation of Engine Cylinder Head Bolt Set.
2018ChevroletMalibu1.5LL4Fits various engine types and models for secure installation of Engine Cylinder Head Bolt Set.
2018ChevroletSpark1.4LL4Fits various engine types and models for secure installation of Engine Cylinder Head Bolt Set.
2018ChevroletVolt1.5LL4Fits various engine types and models for secure installation of Engine Cylinder Head Bolt Set.
2018GMCTerrain1.5LL4Fits various engine types and models for secure installation of Engine Cylinder Head Bolt Set.
2017BuickEncore1.4LL4Fits various engine types and models for secure installation of Engine Cylinder Head Bolt Set.
2017ChevroletCruze1.4LL4Fits various engine types and models for secure installation of Engine Cylinder Head Bolt Set.
2017ChevroletMalibu1.5LL4Fits various engine types and models for secure installation of Engine Cylinder Head Bolt Set.
2017ChevroletSpark1.4LL4Fits various engine types and models for secure installation of Engine Cylinder Head Bolt Set.
2017ChevroletVolt1.5LL4Fits various engine types and models for secure installation of Engine Cylinder Head Bolt Set.
2016BuickEncore1.4LL4Fits various engine types and models for secure installation of Engine Cylinder Head Bolt Set.
2016ChevroletCruze1.4LL4Fits various engine types and models for secure installation of Engine Cylinder Head Bolt Set.
2016ChevroletMalibu1.5LL4Fits various engine types and models for secure installation of Engine Cylinder Head Bolt Set.
2016ChevroletSpark1.4LL4Fits various engine types and models for secure installation of Engine Cylinder Head Bolt Set.
2016ChevroletVolt1.5LL4Fits various engine types and models for secure installation of Engine Cylinder Head Bolt Set.
Directly replaces or cross-references 1 part number
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
General Motors — 12649163