Vaico V10-0283 Engine Coolant Thermostat Housing - Cylinder Head

Engine Coolant Thermostat Housing for Audi and Volkswagen

Vaico V10-0283 is an engine coolant thermostat housing built for specific Audi and Volkswagen applications with OE reference 030121121. It is sized at 87 mm long, 86 mm wide, and 61.5 mm high, making it a direct-fit style replacement for the cylinder head cooling circuit on listed vehicles.

Compatible with select Audi A4, Audi A4 Quattro, and Volkswagen Passat models, this VAICO thermostat housing supports accurate coolant routing and thermostat mounting in the engine cooling system. The VAICO product line focuses on OE-style replacement parts for European vehicles, and this part number is listed with multiple interchange references for application matching.

Key Features

• Engine coolant thermostat housing for the cooling system
• OE reference: 030121121
• Dimensions: 87 mm length, 86 mm width, 61.5 mm height
• Lightweight housing at 0.061 kg
• Fits cylinder head mounting location on listed applications
• VAICO part number V10-0283 for catalog and service lookup

Fitment Details

• Fits 2000 Audi A4, Cylinder Head; Grade: Aftermarket; With OE No. 030121121; VAICO
• Fits 1997-2000 Audi A4 Quattro, Cylinder Head; Grade: Aftermarket; With OE No. 030121121; VAICO
• Fits 1999-2000 Audi A4 Quattro, Cylinder Head; Grade: Aftermarket; EngineVIN: B; With OE No. 030121121; VAICO
• Fits 1998-2000 Volkswagen Passat, Cylinder Head; Grade: Aftermarket; With OE No. 030121121; VAICO
• Fits 1997-1999 Audi A4, Cylinder Head; Grade: Aftermarket; EngineVIN: B; With OE No. 030121121; VAICO

What This Part Helps Address

• Coolant leaks at the thermostat housing area
• Cracked or warped original housing
• Improper thermostat seating or sealing
• Cooling system service on OE-numbered applications
• Replacement of a worn housing during engine cooling repairs

Installation Notes and Tips

Confirm the OE number 030121121 and match the vehicle year, model, and engine VIN notes before installation. Inspect the mating surface on the cylinder head and verify the thermostat and sealing surfaces are clean and undamaged before fitting the housing. Use the listed dimensions to compare the replacement part against the original unit during service.

Quality Assurance

VAICO supplies OE-style replacement components for European vehicle applications, and this thermostat housing is cataloged under V10-0283 with multiple cross-reference numbers for identification. This part cross-references BBB Industries 23346 and OE-style reference 030121121 for the same application.