Dorman 902-5183 Engine Coolant Thermostat Housing Assembly

Engine Coolant Thermostat Housing Assembly

Dorman 902-5183 is a replacement engine coolant thermostat housing assembly built to match the fit and durability of the original housing on specified Mercedes-Benz diesel applications. It uses a metal housing with a gasket included and a thermostat included, helping restore proper coolant control in vehicles such as the Mercedes-Benz E350, GL350, R350, ML350, ML320, R320, GL320, and Sprinter 2500/3500.

This thermostat housing assembly is engineered for vehicles that need a direct-fit cooling system repair, including Mercedes-Benz E350 and Sprinter 3500 models with the listed diesel exhaust treatment and non-heated configurations. Part number 902-5183 is also cross-referenced to Dayco 86105 for the same application.

• Metal housing construction with a natural finish
• Thermostat included for a complete cooling-system repair
• Gasket included for sealing at the housing interface
• One outlet port and two mounting holes
• Designed for specified Mercedes-Benz diesel applications

Detailed Product Overview

Dorman 902-5183 is an engine coolant thermostat housing assembly designed for direct replacement on select Mercedes-Benz vehicles. The housing is made from metal and built to match the original fit and durability requirements of the stock part. Key dimensions include a 1.727 inside diameter, 2.869 flange width, 2.846 flange length, and 0.337 flange thickness, which support proper alignment in the cooling system. The assembly includes a thermostat and gasket, making it a practical choice when servicing the thermostat housing on Mercedes-Benz GL350, ML320, R320, and Sprinter 2500/3500 diesel models.

Vehicle Fitment

• Fits 2011-2012 Mercedes-Benz E350, N/A; Cover; Includes Thermostat; w/Code U42 (Diesel Exhaust Treatment)
• Fits 2010-2012 Mercedes-Benz GL350, N/A; Cover; Includes Thermostat; w/Code U42 (Diesel Exhaust Treatment); Non-Heated
• Fits 2010-2012 Mercedes-Benz R350, N/A; Cover; Includes Thermostat; w/Code U42 (Diesel Exhaust Treatment); Non-Heated
• Fits 2010-2012 Mercedes-Benz Sprinter 2500, N/A; Engine coolant thermostat housing assembly with integrated cover.
• Fits 2010-2012 Mercedes-Benz Sprinter 3500, N/A; Engine coolant thermostat housing assembly with integrated cover.
• Fits 2011 Mercedes-Benz ML350, N/A; Cover; Includes Thermostat; w/Code U42 (Diesel Exhaust Treatment); Non-Heated
• Fits 2010 Mercedes-Benz ML350, N/A; Cover; Includes Thermostat; Non-Heated
• Fits 2009 Mercedes-Benz GL320, N/A; Cover; Includes Thermostat; Non-Heated
• Fits 2007-2009 Mercedes-Benz ML320, N/A; Engine coolant thermostat housing assembly with integrated cover.
• Fits 2007-2009 Mercedes-Benz R320, N/A; Cover; Includes Thermostat; Non-Heated
• Fits 2007-2008 Mercedes-Benz GL320, N/A; Engine coolant thermostat housing assembly with integrated cover.

Common Repair Symptoms

• Coolant leaks at the thermostat housing
• Engine temperature fluctuations from a worn thermostat assembly
• Cracked or warped housing on diesel cooling systems
• Failed sealing surface causing coolant loss
• Cooling system service on Mercedes-Benz diesel models

Installation Notes and Tips

Verify the vehicle’s engine code, diesel exhaust treatment configuration, and heated or non-heated setup before ordering. Confirm the housing shape, bolt-hole spacing, and outlet-port layout against the original part, and replace the gasket during installation to help maintain a proper seal. This part number is 902-5183.

Quality Assurance

Dorman designs this replacement housing to match the fit and durability of the stock assembly and to withstand extreme temperature changes for extended service life. Part number 902-5183 is built as a regular-grade replacement for specified Mercedes-Benz cooling system applications.