Dorman 902-5187 Engine Coolant Thermostat Housing Assembly

Engine Coolant Thermostat Housing Assembly

Dorman 902-5187 is a replacement engine coolant thermostat housing assembly built to match the fit and durability of the original housing on specified Mercedes-Benz applications. It uses a plastic black housing with a standard gasket, included thermostat, and included sensor to help restore proper coolant routing and temperature control.

Compatible with Mercedes-Benz GLA200, GLA250, CLA200, CLA250, CLA45 AMG, GLA45 AMG, A200, A45 AMG, GLA180, A45, B250, CLA180, A180, and B180 models within the listed years, this assembly is designed for vehicles that use the 207 degree F thermostat opening temperature. Part number 902-5187 is also referenced by Motorad 936-207 and interchange number 2702000415.

Key Features

• Engine coolant thermostat housing assembly for specified Mercedes-Benz vehicles
• Plastic housing with black finish
• Thermostat included with 207 degree F opening temperature
• Gasket or seal included with standard gasket type
• Mounting hardware included
• Six mounting holes and three outlet ports
• Inside diameters: 0.72 in. and 0.86 in.
• Flange dimensions: 4.2 in. length, 1.8 in. width, 0.44 in. thickness

Detailed Description

Dorman 902-5187 is engineered as a direct replacement thermostat housing assembly for Mercedes-Benz cooling system service. The housing is built to match stock fit and durability requirements while handling repeated temperature swings found in everyday driving. Its included thermostat, sensor, and seal simplify cooling system repair work on applications such as Mercedes-Benz CLA250, GLA250, and A200 models, as well as other listed CLA, GLA, A-Class, and B-Class vehicles.

This part cross-references Motorad 936-207 and interchange number 2702000415 for the same application. Use part number 902-5187 when verifying cooling system service parts for Mercedes-Benz GLA200, CLA200, and related models.

What It Helps Fix

• Coolant leaks at the thermostat housing
• Cracked or warped plastic housing surfaces
• Sticking thermostat causing unstable engine temperature
• Faulty housing seal or gasket seepage
• Cooling system service issues tied to a worn housing assembly

Installation Notes and Tips

Confirm engine code and housing configuration before installation, since the listed fitment applies to specific Mercedes-Benz 2.5L engine models and years. Inspect mating surfaces, flush contaminated coolant if needed, and verify the sensor connection and outlet port alignment before tightening fasteners. Always follow the vehicle service procedure for coolant refill and air bleeding after replacement.

Quality Assurance

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

• Fits 2014-2020 Mercedes-Benz GLA200, N/A
• Fits 2014-2020 Mercedes-Benz GLA250, N/A
• Fits 2013-2019 Mercedes-Benz CLA200, N/A
• Fits 2013-2019 Mercedes-Benz CLA250, N/A
• Fits 2014-2019 Mercedes-Benz CLA45 AMG, N/A
• Fits 2014-2019 Mercedes-Benz GLA45 AMG, N/A
• Fits 2013-2018 Mercedes-Benz A200, N/A
• Fits 2014-2018 Mercedes-Benz A45 AMG, N/A
• Fits 2016-2018 Mercedes-Benz GLA180, N/A
• Fits 2017 Mercedes-Benz A45, N/A
• Fits 2013-2017 Mercedes-Benz B250, N/A
• Fits 2015-2017 Mercedes-Benz CLA180, N/A
• Fits 2013-2016 Mercedes-Benz A180, N/A
• Fits 2012-2015 Mercedes-Benz B180, N/A