2022-2025 BMW i4, i5, i7, iX Coolant Leak from Changeover Valve

BMW has released Service Information Bulletin (SIB) 17 01 24, Revision 4, dated February 25, 2026, which supersedes the previous SIB 17 01 24 dated March 2025. This bulletin details a potential coolant leak issue affecting various BMW electric vehicles.

This bulletin applies to the following vehicles:

Year	Make	Model
2024	BMW	i5
2025	BMW	iX
2025	BMW	i5
2025	BMW	i7
2024	BMW	iX
2024	BMW	i4
2024	BMW	i7
2023	BMW	i4
2023	BMW	i7
2023	BMW	iX
2022	BMW	iX
2022	BMW	i4

Symptoms of a Coolant Leak

Owners of affected BMW i4, i5, i7, and iX models may notice several indicators of a coolant leak from the changeover valve. The most obvious symptom is coolant leaking from under the car. Additionally, a low heater output inside the cabin can be a sign of this issue. In some cases, drivers might see a Check Control message on the instrument cluster stating, "Drive, you can continue driving" (ID49).

Fault Codes / DTCs

When a coolant leak from the changeover valve occurs, several fault codes may be stored in the vehicle's system. These codes help technicians diagnose the specific problem areas:

Code	Description
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

Cause of the Coolant Leak

The primary cause of these symptoms and the BMW i5 coolant leak is leakage from one or more coolant changeover valves. These valves are critical components in the vehicle's cooling system, and their failure can lead to the observed coolant loss and related issues.

Important Warnings for Owners and Technicians

This repair involves working with high-voltage (HV) systems, which carry significant risks. BMW emphasizes that only properly trained personnel who have completed all applicable HV Technical Training Courses should perform repairs involving disconnecting or removing High Voltage battery components. Work performed by unqualified individuals can result in severe injury or damage to the vehicle. Technicians must refer to Repair Instruction 61 00, "Observe safety instructions when handling electric vehicles."

Before any HV component is disconnected or removed, the HV system must be disabled and secured by a properly trained technician using the HV Disconnect Switch. This will typically be indicated by the "Blitz" – lightning bolt icon displayed in the instrument cluster. High Voltage Battery removal and rework must only be performed by a certified HV Specialist Technician.

Furthermore, any work on the cooling system should only be carried out when the engine has completely cooled down to prevent the risk of scalding. When refilling, only prescribed, life-time coolant should be used, and it should never be reused. It is crucial not to overfill the coolant system.

Repair Procedure Summary

To address the BMW i5 coolant leak and related issues, technicians will first check all coolant changeover valves for active leaks or signs of previous leaks, such as dried coolant residue. Any changeover valves with a production date older than January 5, 2024, (part number 64 11 9 462 114) must be replaced. Improved valves were produced starting January 18, 2024.

The number of changeover valves varies by model:

• G26 (i4 Gran Coupe BEV): 1 valve
• G60 (i5 Sedan BEV): 3 valves
• G70 (i7 Sedan BEV): 1 valve
• i20 (iX Sports Activity Vehicle SAV BEV): 2 valves

If no leaks are found, further diagnosis using ISTA and cooling system test equipment is required. Replacement of the changeover valve(s) follows specific repair instructions:

• For G26 and G70 models, refer to Repair Instruction 64 12 790.
• For i20 models, refer to Repair Instructions 64 12 792 and 17 61 625.

If the electric auxiliary heater also needs replacement, the following repair instructions apply:

• For all models, refer to Repair Instruction 64 12 821.
• For G70 models (specifically for the HV Battery), refer to Repair Instruction 64 12 831.

After repairs, a coolant system bleeding procedure must be performed using ISTA (Vehicle management/Service functions/Electric drive/Cooling/Fill and bleed the cooling system). A functional check of the electric auxiliary heater is also necessary via ISTA (Body/Heating and air conditioning functions/Electric auxiliary heater/Heating and air conditioning functions: electric auxiliary heater). For G70 models, an additional functional check for the high voltage battery's electric auxiliary heater is performed (Electric drive/High-voltage battery unit/Electric auxiliary heater for high-voltage battery unit). The electric auxiliary heater should only be replaced if the test module specifically instructs it.

Required Tools or Parts

To perform this repair, specific parts and materials are needed:

• Changeover valve: Part Number 64 11 9 462 114 (up to 3, as applicable).
• Electric auxiliary heater: Refer to AIR/ETK (MG 64) for the correct part number (1 required, if necessary).
• Electric auxiliary heater for HV battery (G70 only): Refer to AIR/ETK (MG 17) for the correct part number (1 required, if necessary).
• HT-12 Coolant (DN = 1 gallon concentrate): Part Number 83 19 2 468 442.
• HT-12 Antifreeze RTU (Bulk DN = 1/10 Liter) (Pre-mix): Part Number 83 19 5 A32 851.

Additional materials like fluids, lubricants, one-time use screws, nuts, and seals must be selected from the Electronic Parts Catalogue or other approved BMW Group resources based on the specific vehicle type.

Owner Action

If you own a 2022-2025 BMW i4, i5, i7, or iX and are experiencing a BMW i5 coolant leak, low heater output, or have seen the "Drive, you can continue driving" (ID49) message, it is recommended to contact your authorized BMW dealer. This repair is covered under the terms of the BMW New Vehicle Limited Warranty or the BMW Certified Pre-Owned Program. The dealer will diagnose the issue, check for the relevant fault codes, and perform the necessary repairs, including inspecting and potentially replacing the coolant changeover valve(s) and electric auxiliary heater.

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Source: NHTSA ID: 11029046