2022-2025 BMW i4, i5, i7 Electric Auxiliary Heater Failure
BMW Service Action SIB 64 09 25 addresses a faulty electric auxiliary heater in 2022-2025 i4, i5, and i7 models. This can lead to interior heating issues. The repair involves replacing the heater and requires specialized high-voltage training.
Si applica anche a
- BMW i4
- 2022–2024
- BMW i7
- 2023–2025
BMW has released Service Information Bulletin SIB 64 09 25, dated December 22, 2025, to address an issue with the electric auxiliary heater in certain 2022-2025 i4, i5, and i7 electric vehicles. This bulletin, which is Revision 01 and supersedes SI B64 09 25 dated August 2025, outlines the procedure for correcting a potential fault that could lead to a non-functional electric auxiliary heater.
The campaign code for this service action is 3104944833. The repair is classified as both mobile-friendly and remote software upgrade (RSU) friendly.
Symptoms of a Faulty Electric Auxiliary Heater
The primary symptom of this issue is the failure of the electric auxiliary heater. This component is crucial for providing heat to the vehicle's interior. Owners may notice a lack of cabin heating, especially in colder conditions, if the electric auxiliary heater is not functioning correctly.
Important Warnings for Owners and Technicians
BMW has issued several critical warnings regarding this service action, particularly concerning the high-voltage (HV) systems:
- "DO NOT OVERFILL THE COOLANT SYSTEM." This is a direct instruction for technicians during the repair process.
- High-Voltage System Safety: "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." Additional safety information can be found in Repair Instruction 61 00, titled “Observe safety instructions when handling electric vehicles”.
- Technician Certification: Specific training is required for working on high-voltage systems. For Generation 4 vehicles, once the HV system is disabled (indicated by the "Blitz" - lightning bolt icon in the instrument cluster), a non-HV certified technician may remove certain HV components, but not the High Voltage Battery. For Generation 5 vehicles, specific training (e.g., ST2324, ST2205, ST2006, ST1825, ST2325) is mandatory for diagnosing, removing, and servicing any HV component.
Repair Procedure Summary
The correction for a faulty electric auxiliary heater involves its replacement. Technicians are instructed to follow Repair Instruction 64 12 821, which details the steps for "Replacing the electric auxiliary heater." After the replacement and refilling with new coolant, it is essential to bleed the cooling circuit. If any metal cooling system components were replaced, the cooling system's circuit must be drained and refilled with new coolant to ensure anti-corrosion protection.
Required Tools or Parts
The following parts are required for this service action:
- Part Number: 64 12 5B683B8
- Description: Electric instantaneous water heater
- Quantity: 1
- 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
Additional materials and small parts, such as fluids, lubricants, screws, nuts, and seals, should be selected according to the ISTA repair instructions or Electronic Parts Catalog (ETK/AIR) based on the specific vehicle type.
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 Service Action SIB 64 09 25, you should contact your authorized BMW dealer. The repair will be covered under warranty. BMW provides for Alternative Mobility Solution (AMS) expense reimbursement for owners, as outlined in SI B01 29 16. Dealers are instructed to perform this procedure on all affected vehicles before customer delivery or at the next service visit if the customer has already taken delivery.
Source: NHTSA ID: 11026956
Frequently Asked Questions
- What is Service Action SIB 64 09 25 about?
- Service Action SIB 64 09 25 addresses a potential issue with a faulty electric auxiliary heater installed in certain 2022-2025 BMW i4, i5, and i7 electric vehicles, which can lead to a failure of the interior heating system.
- Which BMW models are affected by the faulty electric auxiliary heater?
- The service action applies to 2022-2025 BMW i4, i5, and i7 models. You can check with your dealer or BMW's online tools to see if your specific vehicle is included in this campaign.
- What is the repair for the BMW i5 electric auxiliary heater issue?
- The repair involves replacing the electric auxiliary heater. This procedure, detailed in Repair Instruction 64 12 821, also requires proper coolant management, including bleeding the cooling circuit and potentially draining and refilling the coolant.
- Are there any safety warnings related to this repair?
- Yes, BMW emphasizes critical safety warnings, especially concerning high-voltage (HV) systems. Repairs involving HV components must only be performed by properly trained and certified HV technicians to prevent severe injury or vehicle damage. Owners are also warned not to overfill the coolant system.
- Will I be charged for the repair of the faulty electric auxiliary heater?
- No, this is a service action performed under warranty. BMW also offers Alternative Mobility Solution (AMS) expense reimbursement for owners, as referenced in SI B01 29 16.
What BMW i5 owners report
Counted from the records in our database across 3 model years.
- 31
- Owner complaints
- 10
- Recalls
- 70
- Service bulletins
- 6
- Crashes reported
- 0
- Fires reported
- 3
- Injuries reported
The 2024 model year
21 complaints, the 1st most of 3 model years on file. Owners reported 2 crashes, 0 fires and 0 injuries for this year, which also has 10 recalls on file.
Electrical System, the system this article covers, accounts for 10 of 31 complaints (32%), including 5 for 2024.
Complaints by model year
| 2024 | 21 | |
|---|---|---|
| 2025 | 8 | |
| 2026 | 2 |
Most-reported systems
- Service Brakes — 13
- Electrical System — 10
- Forward Collision Avoidance — 7
- Electronic Stability Control (Esc) — 5
- Hydraulic — 4
Latest recalls for the 2024 model year
- 26V422000 — Service Brakes, Hydraulic (Jul 2026)
- 26V096000 — Electrical System (Feb 2026)
- 25V395000 — Electrical System (Jul 2025)
Recent owner reports about electrical system
The vehicle has had intermittent charging issues where when the battery is below a certain level, it will fail to fully charge. I took it to the dealership and the technician admitted there has been issues with the charging cables and asked me to return with…
Read owner complaints →On May 3, 2026, while operating my 2024 BMW i5 on public roads, the vehicle suffered a sudden and complete loss of power steering with no prior warning. I could not turn the steering wheel at a stop.
Complaints are owner reports filed with NHTSA. They are unverified, and counts depend on how many vehicles were sold, so they are not a failure rate.
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