Service bulletin B612422

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)
Type	Service bulletin
NHTSA id	10249029
Published by NHTSA	2024-02-01
Manufacturer's number	B612422
Manufacturer's date	2024-01-02
NHTSA component	ELECTRICAL SYSTEM

NHTSA's summary

The Combined Charging Unit (CCU) may be affected by a manufacturing defect.

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

Electrical system

Vehicles listed
BMW I4	2022

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

Recalls for the same vehicles and component
25V395000	2025-07-23. ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION MOTOR:CONTROLLER:SOFTWARE
25V470000	2025-07-16. ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
23V449000	2023-06-28. ELECTRICAL SYSTEM:PROPULSION SYSTEM:HYBRID MANAGEMENT
23V118000	2023-02-23. ELECTRICAL SYSTEM:BODY CONTROL MODULE:SOFTWARE
22V944000	2022-12-20. ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY THERMAL:MANAGEMENT:SOFTWARE
22V541000	2022-07-27. ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
22V483000	2022-07-07. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
B640925	2026-01-05. Service campaign. A faulty electric auxiliary heater may have been installed in the certain vehicles. This could result in thefailure of the electric auxiliary heater, utilized for the vehicle interior.
B121425	2025-11-25. Service campaign. RSU availability. BMW AG is conducting a Service Action on certain Model Year 2025 - 2026 BMW vehicles that were produced between March 17, 2021 – November 6, 2025. In certain driving situations there can be a loss of traction or wheel slip followed by a throttle or torque requirement that can potentially damage the axle shafts. Damage of the drive shaft can cause it to break.
B640925	2025-09-03. Service campaign. A faulty electric auxiliary heater may have been installed in the certain vehicles. This could result in thefailure of the electric auxiliary heater, utilized for the vehicle interior.
B120523	2024-12-31. Service bulletin. The customer states there is a Drivetrain Malfunction message displayed in the instrument cluster. In addition, the following fault memory entries are saved in the CCU (Combined Charging Unit) 0317F2 - High-voltage system, insulation fault detected: when switch contactors are closed. 0317F1 - High-voltage system, insulation resistance below warning threshold: when switch contactors are closed. The fault memory entries (isolation faults) can occur both individually and in combination and must be traced back to the eDrive motor based on the ISTA test procedure. If ISTA test procedure lists possible cause of fault as; A metal chip is found behind the brush module (between the brush module and the end shield of the electrical machine). Repair required. Refer to service solution no. 20000794435083 in Aftersales Information Research (AIR). Follow information in the Procedure section below.
B611224	2024-05-03. Service bulletin. The Combined Charging Unit (CCU) may not have been produced according to BMW specifications. This can lead to an internal coolant leak which can result in a failure of the Combined Charging Unit.Possible faults may include- HV charging interruption No high-voltage readiness when starting up The high-voltage system switching off while driving, causing the vehicle to coast slowly to a stop
B610724	2024-04-01. Service bulletin. This Informational Bulletin is intended as a guided work through process to address BEV/PHEV charging issues. The step-by-step guide will help walk you through the correct “basic” steps that should be followed when addressing and diagnosing battery electric vehicles (BEV) and plug in hybrid vehicles (PHEV) charging issues.
B610624	2024-04-01. Service bulletin. This Informational Bulletin is intended as a guided work-through process to address customer charging complaints. The step-by-step guide will help walk you through the “basic” procedure to test the charger/infrastructure when the vehicle does not charge, either at a: Home charger AC Level 1/Level 2 - Flexible Fast Charger/hard wired Wallbox, or a Public AC Level 2, or DC Level 3 - Fast Charging Station Note: All PHEV and BEV vehicles may be affected.
B610324	2024-03-02. Service bulletin. Gen 5 BEV/PHEV vehicles may set the Combined Charging Unit (CCU) in programming abort due to nocommunication to the HV charge socket electronics.
B611305	2024-02-01. Service bulletin. The electrical system of BMW vehicles has been subject to an ongoing development process over the last few years. This has led to increased demands being placed on the battery. This document covers important information for the dealer on how to handle “discharged battery” complaints.
B612523	2023-11-01. Service bulletin. The purpose of this Service Bulletin (SIB) is informational regarding DC (direct current) charging complaints on Gen 5 Battery Electric Vehicles (BEV). It serves as a supporting argument and is intended to help distinguish between a standard designed function or component operation from an actual system fault in a DC charging customer complaint (i.e., “DC Not charging or “DC charging too slow”. Helpful “Tips and Tricks” have been included on each topic within the document that can be used as reference to aid in the diagnosis or in understanding the system. The situation involves several possible causes: 1. Limitation of charging power by the charging station or charging app configuration. 2. Decreasing charging power at a very high state of charge (SoC). 3. Too frequent DC charging attempts within a short period of time. 4. The high-voltage battery is not at the ideal temperature. 5. Ageing of the high-voltage battery.