Dorman 902-5852 Engine Coolant Thermostat Housing Assembly - Water Pump

Dorman 902-5852 Thermostat Housing Assembly

Dorman 902-5852 is an engine coolant thermostat housing assembly for select Mercedes-Benz applications. It is built with a black plastic housing and a thermostat set to open at 217 degrees F, giving you a direct replacement for the original coolant outlet assembly on listed vehicles.

Key Features

• Engine coolant thermostat housing assembly with thermostat included
• Plastic housing with black finish
• 1.8 inside diameter and 1 outlet port
• 3 mounting holes with standard gasket type
• Thermostat opening temperature: 217 degrees F
• Package contents: sensor, thermostat housing, and thermostat
• Cross-references Dorman 902-5852 with Motorad 995-217 for the same application

Detailed Description

This thermostat housing assembly is engineered to match the fit and durability of the stock housing on specified Mercedes-Benz vehicles. The housing is designed to handle repeated temperature swings in the cooling system, helping maintain proper coolant flow and thermostat control in demanding engine conditions. If you are replacing a worn or cracked Mercedes-Benz thermostat housing, Dorman 902-5852 provides the correct housing, thermostat, and sensor configuration for the listed applications.

Compatible With select Mercedes-Benz models including GLE63 AMG, GLS63 AMG, S63 AMG, SL63 AMG, CLS63 AMG S, G63 AMG, E550, E63 AMG, E63 AMG S, GL63 AMG, ML550, ML63 AMG, CL550, CL63 AMG, CLS63 AMG, and CL500. This part number, 902-5852, is also referenced in interchange listings for related OE-style replacement needs.

What It Helps Fix

• Coolant leaks from a cracked or warped thermostat housing
• Engine temperature fluctuations caused by a failing thermostat assembly
• Cooling system warning lights related to thermostat or sensor issues
• Improper coolant routing through the housing outlet
• Service issues on Mercedes-Benz thermostat housing replacement jobs

Installation Notes and Tips

Verify the engine application and housing dimensions before installation, especially on Mercedes-Benz GLE63 AMG, S63 AMG, and E63 AMG listings where fitment notes reference specific engine coverage. The housing uses a standard gasket type and does not include mounting hardware or a gasket/seal, so inspect the sealing surfaces and replace any worn coolant system components during service. Confirm the thermostat opening temperature and outlet orientation match the original part before final assembly.

Quality Assurance

Dorman designs this replacement thermostat housing assembly to match stock fit and durability for the listed vehicles. The plastic construction is selected to withstand extreme temperature changes and support long service life in the engine cooling system.