2024 BMW i4 Electric Auxiliary Heater Delivery Stop SIB 64 07 25

BMW has issued Service Information Bulletin (SIB) 64 07 25, a critical "Delivery Stop" for certain 2024 BMW i4 Gran Coupe vehicles. This bulletin addresses a potential issue with the electric auxiliary heater, identified as G26, which may be faulty. The SIB mandates that all affected vehicles must undergo a repair to replace this component before they can be delivered to customers.

For vehicles already delivered, the repair should be performed during the next service appointment if the campaign status indicates a remedy is available. This ensures the proper functioning of the electric auxiliary heater and prevents potential future issues for the 2024 BMW i4 electric auxiliary heater fault.

Why This Matters

This Delivery Stop, SIB 64 07 25, is crucial because it prevents the sale and delivery of vehicles with a known defect. A faulty electric auxiliary heater (G26) could lead to a failure of the heating system, impacting comfort and potentially other vehicle functions. For customers, it ensures that any new 2024 BMW i4 Gran Coupe they receive has been thoroughly checked and corrected.

The repair involves working with high-voltage (HV) systems, which necessitates specialized training and strict safety protocols. BMW emphasizes that only properly trained personnel should perform these repairs to avoid severe injury or damage.

What's Affected

This Service Information Bulletin applies to specific 2024 BMW i4 Gran Coupe models. These vehicles were produced between November 2, 2023, and December 1, 2023.

The core component affected is the electric auxiliary heater, also referred to as the electric instantaneous water heater (G26). Vehicles requiring this campaign will show an "Open" status in BMW's internal systems such as AIR, AWP, Campaign Summary, or Warranty Vehicle Inquiry. Dealers were advised to check their inventory as of May 17, 2025, for affected units listed in Inventory Campaign Details (ICD) under ROSS.

Important Warnings for Owners and Technicians

BMW has issued several critical warnings related to this Delivery Stop and the repair procedure:

• "Do not deliver to a customer, a New, Certified Pre-Owned or Used vehicle subject to a Delivery Stop, until the vehicle is repaired."
• "Do not use or sell replacement equipment/parts subject to a Delivery Stop."
• "Only properly trained personnel, who passed all applicable HV Technical Training Courses, should perform repairs which require disconnecting, or removal of High Voltage battery components on any Hybrid or Electric Vehicle. Work performed on High Voltage systems by unqualified persons may result in severe injury or damage to the vehicle."
• "Prior to disconnecting, or the removal of any HV component, the HV system needs to be disabled and secured (by means of the HV Service Disconnect Switch and lock out) by a properly trained HV technician, who has a minimum HV Qualification level after completing the Technical Training."

These warnings underscore the importance of the repair and the specialized nature of working with high-voltage components. Technicians must have specific training, including courses like "ST2324 High Voltage Drivetrain Systems," "ST1824 Alternative Drive Part 1," "ST2205 Generation 5 High-voltage class," "ST2006 – SP44 HV Battery," "ST1825 – Alternative Drive Part 2," and "ST 2325 for High Voltage Battery Systems" depending on the vehicle generation and specific HV component.

Repair Procedure Summary

The correction for the 2024 BMW i4 electric auxiliary heater fault involves replacing the faulty electric auxiliary heater (G26). Technicians are instructed to follow Repair Instruction 64 12 821, which details the process for "Replacing the electric auxiliary heater (after vehicle diagnosis)."

The procedure typically includes diagnosing the vehicle to confirm the fault, safely disabling and securing the high-voltage system, and then proceeding with the removal and replacement of the electric auxiliary heater. This work package, identified by labor operation codes 00 78 671 (Plusposition) or 00 78 141 (Main work), specifically covers replacing the electric auxiliary heaters for both the vehicle interior and the high-voltage battery. The repair code for this action is 0064420200.

Required Tools or Parts

To complete the repair for the 2024 BMW i4 electric auxiliary heater fault, the following parts are specified:

• Part Number: 64 12 5B36BF9
  • Description: Electric instantaneous water heater
  • Quantity: 1

Additionally, technicians will need antifreeze/coolant for the high-voltage system. The following options are available:

• Part Number: 83 19 5A32851
  • Description: HT-12 Antifreeze RTU (Bulk DN = 1/10 Liter) (Pre-mix)
  • Quantity: As required
• Part Number: 83 19 2468442
  • Description: BMW Antifreeze/Coolant (DN = 1 Gallon Concentrate) - HT-12
  • Quantity: As required

Other small parts, fluids, lubricants, one-time use screws, nuts, and seals must be selected from the Electronic Parts Catalog (ETK) or other approved BMW Group resources as per the specific vehicle type.

Owner Action

If you own a 2024 BMW i4 Gran Coupe that falls within the production dates of November 2, 2023, and December 1, 2023, and have not yet taken delivery, your vehicle will be repaired by the dealer before you receive it. If you have already taken delivery, BMW will perform this repair during your next scheduled service visit, provided the campaign status indicates a remedy is available.

There is no cost to the owner for this repair, as it is covered under a Delivery Stop/Service Information Bulletin. BMW also offers Alternative Mobility Solution (AMS) expense reimbursement for qualifying repairs. Contact your authorized BMW dealer to confirm if your vehicle is affected by SIB 64 07 25 and to schedule the necessary service.

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Source: NHTSA ID: 11019571