Dorman 902-5870 Engine Coolant Thermostat Housing Assembly

Engine Coolant Thermostat Housing for Audi and Volkswagen

Dorman 902-5870 is a replacement engine coolant thermostat housing assembly built to match the fit and durability of the original housing on specified vehicles. It includes the thermostat and O-ring, and the plastic housing is engineered to handle repeated temperature swings in the cooling system.

• Replacement engine coolant thermostat housing assembly for select Audi and Volkswagen 2.5L applications
• Plastic housing with black finish
• Thermostat included with 176 Deg. F opening temperature
• Gasket or seal included; standard gasket type
• 1 outlet port and 2 mounting holes
• Cross-references Motorad 580-176 and URO 06F121111H for the same application

Fitment Details

• Fits 2009-2015 Audi TTS Quattro, N/A, 2.5L engine models.
• Fits 2011-2014 Audi TT, N/A, 2.5L engine models.
• Fits 2012-2013 Audi TT Quattro, N/A, 2.5L engine models.
• Fits 2012-2013 Volkswagen Golf R, N/A, 2.5L engine models.
• Fits 2008-2012 Audi S3, N/A, 2.5L engine models.
• Fits 2010 Audi TT Quattro, N/A, Assembly; Engine Desg. CDMA.

Detailed Description

This Dorman thermostat housing assembly is a direct replacement for select Audi TT, Audi TTS Quattro, Audi S3, and Volkswagen Golf R models with 2.5L engines. The housing is molded from plastic and paired with a thermostat calibrated to open at 176 Deg. F, helping restore proper coolant flow control in the engine cooling system. Dorman 902-5870 is built for vehicles that need a thermostat housing assembly with the correct flange dimensions, outlet configuration, and seal interface for a stock-style repair.

For Audi and Volkswagen owners addressing cooling system service, this part provides a practical OE-style solution for the thermostat housing area. The included thermostat, O-ring, and standard gasket help simplify the repair on the specified applications, including 2009-2015 Audi TTS Quattro and other listed 2.5L fitments.

Common Repair Uses

• Cracked or warped thermostat housing
• Coolant leaks at the housing or seal surface
• Thermostat sticking open or closed
• Improper engine warm-up or temperature regulation
• Cooling system service on select Audi TT and Volkswagen Golf R models

Installation Notes

Verify engine code and fitment before installation, especially on the 2010 Audi TT Quattro application noted for engine designation CDMA. Inspect the mating surfaces, replace worn coolant hoses or clamps as needed, and confirm the seal seats evenly before refilling and bleeding the cooling system. Use the correct coolant specification for the vehicle and check for leaks after the engine reaches operating temperature.

Quality Assurance

Dorman designs this replacement thermostat housing assembly to match the fit and durability of the original part on the listed vehicles and to withstand extreme temperature changes for extended service life.