Dorman 902-957 Engine Coolant Thermostat Housing Assembly

Engine Coolant Thermostat Housing Assembly

Dorman 902-957 is a replacement engine coolant thermostat housing assembly for select Volkswagen applications. It is built to match the fit and durability of the original housing and uses a plastic housing with a gasket and thermostat included for a direct repair on the specified vehicles.

Compatible with 2003-2007 Volkswagen Polo and 2005 Volkswagen Lupo 1.6L, this thermostat housing assembly is designed for vehicles that need a housing with a single sensor port and no cover. The Dorman 902-957 part number is a practical OE-style replacement for cooling system service on these applications.

Key Features

• Replacement engine coolant thermostat housing assembly for select Volkswagen models
• Plastic housing with black finish
• Thermostat included, opening at 192 degrees F
• Gasket or seal included for installation
• One outlet port and four mounting holes
• Designed to handle extreme temperature changes for extended service life
• Package contents include thermostat housing, water outlet, thermostat, gasket, and plug

Detailed Description

Dorman 902-957 is engineered as a direct replacement for the stock thermostat housing assembly used on select Volkswagen Polo and Volkswagen Lupo vehicles. It is built from plastic and shaped to match the original fit, with flange dimensions and bolt-hole spacing that support proper alignment during cooling system repair. The included thermostat opens at 192 degrees F, helping regulate coolant flow once operating temperature is reached. This part cross-references Motorad TA9957 for the same application.

Common Cooling System Issues It Can Address

• Coolant leaks at the thermostat housing
• Cracked or warped plastic housing surfaces
• Faulty thermostat operation affecting engine temperature control
• Damaged sealing surfaces around the housing gasket
• Cooling system service needs on vehicles with a single sensor port housing

Installation Notes and Tips

Verify the vehicle application before installation, especially for 2003-2007 Volkswagen Polo and 2005 Volkswagen Lupo 1.6L with engine designation BLH and option code 7GC. Confirm the housing style, sensor-port configuration, and cover arrangement match the original part. Clean the mating surfaces thoroughly before installing the included gasket, and refill and bleed the cooling system according to factory service procedures after replacement.

Quality Assurance

Dorman designs this thermostat housing assembly to match the fit and durability of the original equipment housing on the listed vehicles. The construction is intended to withstand repeated temperature cycling in normal cooling system operation.