Thermostat, BMW - F44 2-Series, F48 X1, F39 X2 (B46D, B48E)

This part is listed by BMW as BMW part number 11538843405 (11 53 8 843 405) and is described as the heat management module for B46D and B48D engines used in 2021+ F44 228i/M235i Gran Coupe, 2020-2022 X1 28i, and 2020-2023 X2 28i/M35i.

Only for second-generation B46/B48 engines (2020+)

The Heat Management Module is the critical central portal for the B46 cooling system. It's an intelligent thermostat, routing hot and cool fluid to various points in the system.

This is a Genuine BMW B46D/B48D heat/cooling module with a two year warranty. Buying a Genuine part will usually be more expensive than an OEM or aftermarket brand but you are assured that it meets BMW's designs for fitment, performance, and longevity. It will also be the very latest design, incorporating any updates or revisions that an aftermarket brand typically will ignore.

This part replaces or is compatible with BMW part numbers 11538843405, 11 53 8 843 405, 11538631943, 11 53 8 631 943.

For full BMW fitment information or for assistance from one of our BMW experts, we recommend calling us at 877-639-9648.