URO 078121121J Engine Coolant Thermostat Housing

Reliable Engine Coolant Thermostat Housing for Audi and Volkswagen

The URO 078121121J engine coolant thermostat housing is designed to provide a durable and precise fit for select Audi and Volkswagen models. Crafted from die cast aluminum, this silver thermostat housing ensures efficient heat dissipation and long-lasting performance in your vehicle's cooling system.

• Constructed from die cast aluminum for strength and corrosion resistance
• Silver finish complements engine bay aesthetics
• Outlet port diameter: 31.9 mm for accurate coolant flow
• Inlet port diameter: 66.7 mm to match OEM specifications
• Height of 30.6 mm and flange thickness of 10.8 mm for proper fitment
• Bolt hole center to center distance of 81.79 mm ensures secure mounting
• Compatible with multiple Audi and Volkswagen models including A4, A6, Passat, and S4

Detailed Product Description

This URO engine coolant thermostat housing (part number 078121121J) is engineered to meet the exact specifications required by Audi and Volkswagen vehicles such as the 90, 90 Quattro, A4, A4 Quattro, A6, A6 Quattro, Cabriolet, Passat, and S4. The die cast aluminum construction offers enhanced durability and resistance to heat and corrosion compared to plastic alternatives. The precise inlet and outlet port diameters (66.7 mm and 31.9 mm respectively) ensure optimal coolant flow, maintaining engine temperature regulation. The housing's dimensions, including a height of 30.6 mm and flange thickness of 10.8 mm, align with OEM standards for a secure and leak-free installation.

Common Applications and Issues Addressed

• Replacement for cracked or leaking thermostat housings
• Restores proper coolant flow and engine temperature control
• Prevents overheating caused by faulty housing seals or warping
• Eliminates coolant leaks that can lead to engine damage
• Maintains engine efficiency in Audi A4, A6, Passat, and S4 models

Installation Notes and Tips

When installing the URO 078121121J thermostat housing, ensure the mating surfaces are clean and free of old gasket material, as this part does not include a gasket or seal. Use the correct torque specifications for the bolt hole center spacing of 81.79 mm to avoid warping the housing. Verify compatibility with your specific Audi or Volkswagen model before installation to ensure proper fitment.

Quality Assurance and Warranty

URO parts are manufactured to meet or exceed OEM standards, providing reliable performance and durability. While no specific warranty information is provided, URO products are known for consistent quality in replacement automotive components. Using the 078121121J thermostat housing helps maintain the integrity of your vehicle's cooling system with a precision-engineered replacement part.