Dorman 902-5823 Engine Coolant Thermostat Housing Assembly

Engine Coolant Thermostat Housing Assembly

Dorman 902-5823 is a replacement engine coolant thermostat housing assembly for select BMW applications. It combines the thermostat, housing, and sensor in one assembly to restore proper coolant routing and temperature control in the cooling system.

• Plastic housing with black finish
• Includes gasket/seal and thermostat
• Thermostat opening temperature: 217 Deg. F
• Three outlet ports
• Package contents: 1 thermostat, 1 thermostat housing, 1 sensor
• Cross-reference: BMW 11537605431 and Motorad 916-217

Fitment Details

• Fits 2013-2019 BMW 640i Gran Coupe, N/A
• Fits 2016-2019 BMW 640i xDrive Gran Coupe, N/A
• Fits 2012-2018 BMW 640i, N/A
• Fits 2016-2018 BMW 640i xDrive, N/A
• Fits 2013-2015 BMW 740Li, N/A
• Fits 2013-2015 BMW 740Li xDrive, N/A
• Fits 2013-2015 BMW ActiveHybrid 7, N/A

Detailed Description

This Dorman thermostat housing assembly is built to match the fit and durability of the original housing on specified BMW models. The plastic construction, integrated gasket, and included sensor help simplify replacement of a worn or leaking cooling-system housing. Dorman 902-5823 is a direct-fit cooling system service part for BMW 640i, 640i xDrive, 640i Gran Coupe, 640i xDrive Gran Coupe, 740Li, 740Li xDrive, and ActiveHybrid 7 applications listed above.

Common Repair Symptoms

• Coolant leaks at the thermostat housing
• Engine running hotter than normal
• Temperature warning lights or cooling-system faults
• Cracked or warped housing from heat cycling
• Failed thermostat or sensor-related cooling issues

Installation Notes

Verify engine application before installation, since the listed BMW models are tied to specific engine configurations. Replace the housing on a cool engine, inspect mating surfaces, and confirm the gasket seats evenly before refilling and bleeding the cooling system. Mounting hardware is not included.

Quality Assurance

This replacement housing is engineered to match stock fit and durability requirements and is built to withstand repeated temperature changes for extended service life. Part number 902-5823 is a practical OE-style replacement for cooling-system service on the listed BMW vehicles.