BMW B58 Thermostat Assembly Heat Management Module - 11538642559

The B58 thermostat heat management module is a common problem on the new B58 engines.  A common issue typically involves a restriction of coolant which can cause the engine to overheat more than expected.  This is due to the position of the rotary valve in the heat management module being stuck in its neutral or warm up position. Typical stored faults for a failing/failed HMM are 20F220, 20F206, and 20A704. Replace yours with this high quality OE replacement made by INA, who is the supplier for BMW. Replaces BMW PN 11538642559 Fitment: 540i 2020-2023 (14) Thermostat Assembly 540i xDrive 2020-2023 (10) Thermostat Assembly 740i 2019-2022 (10) Thermostat Assembly 740i xDrive 2020-2022 (9) Thermostat Assembly 745Le xDrive 2020-2022 (3) Thermostat Assembly 745e xDrive 2020-2022 (9) Thermostat Assembly 840i 2020-2024 (11) Thermostat Assembly 840i Gran Coupe 2020-2024 (13) Thermostat Assembly 840i xDrive 2020-2024 (13) Thermostat Assembly 840i xDrive Gran Coupe 202