Availability

Thermostat Housing and Water Necks

Thermostat housing, water neck, water outlet, coolant housing…they’re all names for the same thing. This component is where the upper radiator hose plugs...

Thermostat housing, water neck, water outlet, coolant housing…they’re all names for the same thing. This component is where the upper radiator hose plugs in, and it also contains your mechanical thermostat. Grab a stock replacement to replace a leaky or broken one, dress up your engine with a chrome or anodized finish, or use a 360° swiveling model for versatility on your custom cooling system.

Top Brands

Our powerful search tools make it easy to find the right water neck from manufacturers like Meziere, Dorman, Mr. Gasket, Four Seasons, Trans-Dapt, ACDelco, and so many more.

Thermostat housing, water neck, water outlet, coolant housing…they’re all names for the same thing. This component is where the upper radiator hose plugs in, and it also contains your mechanical thermostat. Grab a stock replacement to replace a leaky or broken one, dress up your engine with a chrome or anodized finish, or use a 360° swiveling model for versatility on your custom cooling system.

Top Brands

Our powerful search tools make it easy to find the right water neck from manufacturers like Meziere, Dorman, Mr. Gasket, Four Seasons, Trans-Dapt, ACDelco, and so many more.

Showing In Stock Items. Show All 3 Items.

Individual Parts

Part Groups

Results 1 - 3 of 3

Rein Automotive Coolant Hose Flange Kits for 2000-2002 GOLF, 2001-2005 JETTA - CHS0647

Thermostat Housings, Coolant Hose Flange Kit, Includes 2 Hoses, 1 Flange, 1 Seal, 1 O-Ring, 1 Sensor, 1 Lock Pin, 1 Thermostat, Volkswagen, Kit

Part Number: RIN-CHS0647

Not Yet Reviewed

Estimated Ship Date: Nov 6, 2025 if ordered today

...Loading

Estimated Ship Date: Nov 6, 2025 if ordered today

Rein Automotive Coolant Hose Flange Kits for 2001 A4, A4 QUATTRO, 2000-2005 PASSAT - CHS0645

Thermostat Housings, Coolant Hose Flange Kit, Includes 1 Hose, 1 Flange, 1 Gasket, 1 O-Ring, 1 Sensor, 1 Lock Pin, 1 Thermostat, Audi, Volkswagen, Kit

Part Number: RIN-CHS0645

Not Yet Reviewed

Estimated Ship Date: Nov 6, 2025 if ordered today