Vaico V10-9709 Engine Coolant Thermostat Housing

Engine Coolant Thermostat Housing for Audi and Volkswagen

VAICO V10-9709 is an engine coolant thermostat housing for select Audi and Volkswagen applications. Built to match the listed dimensions and OE cross-reference numbers, it supports proper thermostat mounting and coolant routing in the engine cooling system.

Key Features

• Engine coolant thermostat housing for the cooling system
• Brand line: VAICO, a product line focused on OE-style replacement parts
• Dimensions: 127 mm length, 124 mm width, 103 mm depth, 52 mm height
• Lightweight housing at 0.066 kg
• Cross-references OE-style part numbers 074 121 121 and 74 121 121
• Part number V10-9709 for ordering and catalog lookup

Detailed Description

VAICO V10-9709 is an engine coolant thermostat housing used in the cooling system to retain and locate the thermostat assembly and maintain the coolant flow path. The housing dimensions are 127 mm long, 124 mm wide, 103 mm deep, and 52 mm high, which helps confirm physical fit during replacement work. This part cross-references 074 121 121 and 74 121 121 for the same application. It is listed for 1992-1995 Audi S4 and S6, plus 1993 and 1995 Volkswagen EuroVan models. Search terms such as Audi S4 thermostat housing, Audi S6 coolant thermostat housing, and Volkswagen EuroVan engine coolant thermostat housing apply to this part number V10-9709.

What It Helps Address

• Coolant leaks at the thermostat housing interface
• Cracked or warped thermostat housing replacement needs
• Improper thermostat seating or coolant bypass issues
• Cooling system service on Audi S4, Audi S6, and Volkswagen EuroVan models

Installation Notes and Tips

Verify the housing dimensions and OE cross-reference numbers before installation. Inspect the thermostat, sealing surfaces, and coolant hoses during service, and clean mating surfaces thoroughly to support a proper seal. Confirm the vehicle application by year and model: Fits 1992-1994 Audi S4, N/A; Fits 1995 Audi S6, N/A; Fits 1993 Volkswagen EuroVan, N/A; Fits 1995 Volkswagen EuroVan, N/A.

Quality Assurance

VAICO parts are cataloged as OE-style replacement components for European vehicle applications. Part number V10-9709 is listed with direct interchange references and published dimensional data to support accurate selection for Audi and Volkswagen cooling system repairs.