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Service bulletin B170124

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id11029046
Published by NHTSA2026-02-26
Manufacturer's numberB170124
Manufacturer's date2026-02-25
NHTSA componentENGINE

NHTSA's summary

There is coolant leaking from under the car Low heater output Possible Check Control message “Drive, you can continue driving” (ID49) Possible fault codes stored in these BEV vehicles: 224163 – Electric auxiliary heater for the high-voltage battery unit: Undervoltage or internal communication fault 8049AA - Coolant level sensor, expansion tank: Coolant level low or short circuit to ground or line disconnection 80124F – Electric auxiliary heater: Communication in electric auxiliary heater faulty 224F60 - Coolant level sensor, expansion tank: Coolant level low or short circuit to ground or line disconnection 224111 - Cooling system for power electronics: Coolant loss detected 224107 - Cooling system for high-voltage battery unit, component protection: Detection of coolant loss

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Engine

Vehicles listed
BMW I42022, 2023, 2024
BMW I52024, 2025
BMW I72023, 2024, 2025
BMW IX2021
BMW IX2022, 2023, 2024, 2025

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
B6403262026-05-18. Service bulletin. After starting up the vehicle, a distinct, constant, “humming” noise can be heard from the right area of the instrument panel.
B0636252025-07-02. Other. Hydrobearing Return
B6407252025-06-17. Service campaign. A faulty electric auxiliary heater may have been installed in the certain vehicles. This could result in the failure of the electric auxiliary heater.
B6406252025-06-17. Service campaign. A faulty electric auxiliary heater may have been installed in the certain vehicles. This could result in the failure of the electric auxiliary heater.
B1701252025-05-02. Service campaign. The coolant hose which runs from the combined charging unit (CCU) to the front electric motor’s housingmay develop a leak at the motor end of the hose.
B1701242025-04-03. Service bulletin. There is coolant leaking from under the car Low heater output Possible Check Control message “Drive, you can continue driving” (ID49) Possible fault codes stored in these BEV vehicles: 224163 – Electric auxiliary heater for the high-voltage battery unit: Undervoltage or internal communication fault 8049AA - Coolant level sensor, expansion tank: Coolant level low or short circuit to ground or line disconnection 80124F – Electric auxiliary heater: Communication in electric auxiliary heater faulty 224F60 - Coolant level sensor, expansion tank: Coolant level low or short circuit to ground or line disconnection 224111 - Cooling system for power electronics: Coolant loss detected 224107 - Cooling system for high-voltage battery unit, component protection: Detection of coolant loss
B1701242025-02-24. Service bulletin. There is coolant leaking from under the car Low heater output Possible Check Control message “Drive, you can continue driving” (ID49) Possible fault codes stored in these BEV vehicles: 224163 – Electric auxiliary heater for the high-voltage battery unit: Undervoltage or internal communication fault 8049AA - Coolant level sensor, expansion tank: Coolant level low or short circuit to ground or line disconnection 80124F – Electric auxiliary heater: Communication in electric auxiliary heater faulty 224F60 - Coolant level sensor, expansion tank: Coolant level low or short circuit to ground or line disconnection 224111 - Cooling system for power electronics: Coolant loss detected 224107 - Cooling system for high-voltage battery unit, component protection: Detection of coolant loss
B1701242025-02-10. Service bulletin. There is coolant leaking from under the car Low heater output Possible Check Control message “Drive, you can continue driving” (ID49) Possible fault codes stored in these BEV vehicles: 224163 – Electric auxiliary heater for the high-voltage battery unit: Undervoltage or internalcommunication fault 8049AA - Coolant level sensor, expansion tank: Coolant level low or short circuit to ground or linedisconnection 80124F – Electric auxiliary heater: Communication in electric auxiliary heater faulty 224F60 - Coolant level sensor, expansion tank: Coolant level low or short circuit to ground or linedisconnection 224111 - Cooling system for power electronics: Coolant loss detected 224107 - Cooling system for high-voltage battery unit, component protection: Detection of coolantloss
B6413242024-12-31. Service campaign. Quality checks have determined that the coolant changeover valve may develop a coolant leak under verylow outside temperatures (significantly lower than 32º F (0 C)).
B6407242024-07-25. Service campaign. Quality checks have determined that the coolant changeover valve may develop a coolant leak under very low outside temperatures (significantly lower than 32º F (0 C)).