2022-2025 BMW i4, i5, i7 Electric Auxiliary Heater Fault

Symptoms

Owners of affected vehicles may experience a failure of the electric auxiliary heater, which is responsible for providing heating to the vehicle interior. This can result in a lack of cabin heating, especially in colder conditions.

Diagnosis and Trigger Conditions

A faulty electric auxiliary heater may have been installed in certain vehicles during manufacturing. This manufacturing defect can lead to the heater's eventual failure. Vehicles requiring this service action will show an "Open" status when checked in BMW's internal systems such as AIR, AWP, Campaign Summary, or Warranty Vehicle Inquiry.

Repair Procedure Summary

The repair involves replacing the faulty electric auxiliary heater. Technicians are instructed to follow BMW Repair Instruction 64 12 821, titled "Replacing the electric auxiliary heater." After the new heater is installed, the cooling system must be refilled with new coolant, and the cooling circuit must be properly bled.

Required Parts

To perform this service action, the following parts are required:

• Electric instantaneous water heater: Part Number 64 12 5B683B8 (Quantity: 1)
• Antifreeze/Coolant (as required):
  • 83 19 5A32851 (HT-12 Antifreeze RTU, Pre-mix)
  • Or: 83 19 2468442 (BMW Antifreeze/Coolant HT-12, Concentrate)

Important Warnings for High-Voltage Systems

Working on High-Voltage (HV) systems in BMW Group vehicles requires specialized training and precautions. Only properly trained personnel who have passed all applicable HV Technical Training Courses should perform repairs that involve disconnecting or removing High Voltage battery components on any Hybrid or Electric Vehicle. Unqualified individuals attempting such work risk severe injury or vehicle damage.

For Generation 5 vehicles, which include the BMW i4, i5, and i7, specific training is mandatory for diagnosing, removing, and servicing any HV component. Non-HV certified technicians are strictly prohibited from working on the high-voltage system. High Voltage Battery removal and rework can ONLY be performed by a High-voltage Certified Technician with a corresponding HV Battery Certification level.

Specific training courses mentioned include:

• "ST2324 High Voltage Drivetrain Systems"
• "ST1824 Alternative Drive Part 1"
• "ST2006 – SP44 HV Battery"
• "ST2205 Generation 5 High-voltage class"
• "ST 2325 for High Voltage Battery Systems"

Prior to any HV component work, the HV system must be disabled and secured using the HV Service Disconnect Switch and lock-out procedures by a properly trained HV technician.

Owner Action

If you own a 2022-2025 BMW i4, i5, or i7 and suspect an issue with your electric auxiliary heater, or if you receive notification about this service action, you should contact your authorized BMW dealer to schedule an appointment. This service action, identified by SIB 64 09 25, qualifies for Alternative Mobility Solution (AMS) expense reimbursement, meaning you may be eligible for a loaner vehicle or other mobility options during the repair. The repair code for this service is 0064450200.

Service Action Details

This service action is identified as SIB 64 09 25 and has a campaign code of 3104944833. The repair code for this procedure is 0064450200, which corresponds to "Replacing interior electric auxiliary heater" for G26, G60, and G70 BEV models. Labor operations include 00 78 764 (24-27 FRU) for in-stock vehicles or 00 78 217 (26-29 FRU) for customer vehicles.

NHTSA ID: 11022362