Dorman 902-5850 Engine Coolant Thermostat Housing Assembly

Dorman 902-5850 Thermostat Housing Assembly

Dorman 902-5850 is a replacement engine coolant thermostat housing assembly built for specified Mercedes-Benz diesel applications. It matches the stock housing’s fit and durability requirements while using a metal construction made to handle repeated temperature swings.

Compatible with Mercedes-Benz Sprinter 2500, Sprinter 3500, Sprinter 3500XD, E350, R350, and E320 applications listed below, this thermostat housing assembly includes the thermostat and gasket for a direct repair approach. The 198-degree thermostat opening temperature supports proper coolant flow control in the engine cooling system.

Key Features

• Metal thermostat housing assembly with a natural finish
• Includes thermostat and gasket
• 198-degree thermostat opening temperature
• Single outlet port design
• Built to match stock housing fit and durability on specified vehicles
• Dorman part number 902-5850 for easy identification

Detailed Description

This engine coolant thermostat housing assembly is engineered for Mercedes-Benz cooling system service where the original housing has worn, cracked, or no longer seals correctly. The metal housing helps resist temperature-related stress, while the included thermostat and gasket support a complete cooling system repair on the listed Sprinter, E-Class, and R-Class diesel applications. This part cross-references Motorad 967-198 for the same application.

Use Dorman 902-5850 when servicing a Mercedes-Benz Sprinter 2500 thermostat housing assembly with integrated cover, a Mercedes-Benz Sprinter 3500 thermostat housing assembly with integrated cover, or a Mercedes-Benz Sprinter 3500XD thermostat housing assembly with integrated cover. It also applies to select 2013 Mercedes-Benz E350 and R350 diesel configurations, plus 2007-2009 Mercedes-Benz E320 applications noted below.

Vehicle Fitment

• Fits 2022 Mercedes-Benz Sprinter 2500, N/A, includes thermostat.
• Fits 2022 Mercedes-Benz Sprinter 3500, N/A, includes thermostat.
• Fits 2022 Mercedes-Benz Sprinter 3500XD, N/A, includes thermostat.
• Fits 2013-2021 Mercedes-Benz Sprinter 2500, N/A, engine coolant thermostat housing assembly with integrated cover.
• Fits 2013-2021 Mercedes-Benz Sprinter 3500, N/A, engine coolant thermostat housing assembly with integrated cover.
• Fits 2018-2021 Mercedes-Benz Sprinter 3500XD, N/A, engine coolant thermostat housing assembly with integrated cover.
• Fits 2013 Mercedes-Benz E350, N/A, cover; includes thermostat; w/Code U42 (Diesel Exhaust Treatment).
• Fits 2013 Mercedes-Benz R350, N/A, cover; includes thermostat; w/Code U42 (Diesel Exhaust Treatment); non-heated.
• Fits 2007-2009 Mercedes-Benz E320, N/A, cover; includes thermostat; wo/Code U43 or U83 (Exhaust Gas Cleaning Package); non-heated.

Installation Notes and Tips

• Confirm engine code and emissions equipment before ordering, especially on 2013 E350, 2013 R350, and 2007-2009 E320 applications.
• Inspect the mating surfaces and coolant passages before installation.
• Replace worn seals and refill the cooling system with the correct coolant specification after service.
• Bleed the cooling system according to Mercedes-Benz service procedures to remove trapped air.

Quality Assurance

Dorman designs this replacement thermostat housing assembly to match the fit and durability of the original housing on the specified Mercedes-Benz applications. The metal construction is selected to withstand extreme temperature changes and support long service life in the cooling system.