Dorman 902-5177 Engine Coolant Thermostat Housing Assembly

Engine Coolant Thermostat Housing Assembly

Dorman 902-5177 is a replacement engine coolant thermostat housing assembly built for specified Mercedes-Benz applications. It matches the stock housing’s fit and durability requirements while using a plastic housing with a black finish, integrated thermostat, and gasket seal for a direct-service cooling system repair.

Key Features

• Replacement thermostat housing assembly for Mercedes-Benz cooling system service
• Plastic housing with black finish
• Includes thermostat and gasket seal
• Thermostat opening temperature: 217 degrees F
• Three outlet ports and five mounting holes
• Designed to handle repeated temperature swings for longer service life
• Cross-references Gates 34833 and Motorad 788-217 for the same application

Detailed Description

This Dorman thermostat housing assembly, part number 902-5177, is engineered for vehicles that use an integrated coolant thermostat housing design. It is a direct replacement style component for Mercedes-Benz E250, SLK200, C250, SLK250, C200, E200, E500, and C180 applications listed in the fitment data. The housing is made from plastic and includes the thermostat, gasket, and sensors needed for a complete cooling-system housing service. With a 217 degrees F thermostat opening temperature, it is built to regulate coolant flow at the specified operating point for the covered vehicles.

Compatible With 2011-2016 Mercedes-Benz E250, 2012-2016 Mercedes-Benz SLK200, 2012-2015 Mercedes-Benz C250, 2012-2015 Mercedes-Benz SLK250, 2010-2014 Mercedes-Benz C200, 2012-2013 Mercedes-Benz E200, 2013 Mercedes-Benz E500, 2013 Mercedes-Benz SLK250, and 2011-2012 Mercedes-Benz C180. Dorman 902-5177 is a practical OE-style replacement when the original thermostat housing has cracked, warped, or begun leaking.

What It Helps Fix

• Coolant leaks from a cracked or warped thermostat housing
• Engine temperature fluctuations caused by a worn thermostat
• Coolant seepage at the housing gasket seal
• Overheating concerns related to restricted thermostat operation
• Cooling system service needs on Mercedes-Benz E250, C250, SLK250, and related models

Installation Notes and Tips

Verify the housing shape, outlet port layout, and mounting-hole pattern against the original part before installation. Replace the gasket seal during service and inspect the mating surfaces for residue, pitting, or distortion. Confirm sensor connections and coolant level after installation, then bleed the cooling system according to the vehicle service procedure.

Quality Assurance

Dorman designs this replacement thermostat housing assembly to match the fit and durability of the original housing on the specified vehicles. The construction is intended to withstand extreme temperature changes encountered in normal engine operation.