NHTSA ID Number: 11029046
Manufacturer Communication Number: B170124
TSB/Document Date: 2026-02-26
Summary
There is coolant leaking from under the car Low heater output Possible Check Control message “Drive, you can continue driving” (ID49) Possible fault codes stored in these BEV vehicles: 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
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TSB/Document ID: B170124
Replacement Service Bulletin Number:
MFR Communication Date: 2026-02-25
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ENGINE
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
2/26/26, 4:58 AM
17 01 24_COOLANT LEAK AT CHANGEOVER VALVE
SIB 17 01 24
COOLANT LEAK AT CHANGEOVER VALVE
2026-02-25
This Service Information Bulletin (Revision 4) replaces SI B17 01 24 dated March 2025.
What’s New:
Model: Up to and including vehicle product data information added
Claim Information section updated
Attachment renamed
☐
THIS REPAIR IS MOBILE FRIENDLY
MODEL
E-Series
G26
G60
G70
i20
Model Description
i4 Gran Coupe Battery Electric Vehicle (BEV)
i5 Sedan (BEV)
i7 Sedan (BEV)
iX Sports Activity Vehicle (SAV BEV)
Production
Produced up to, and including
January 17, 2024
SITUATION
There is coolant leaking from under the car
Low heater output
Possible Check Control message “Drive, you can continue driving” (ID49)
Possible fault codes stored in these BEV vehicles:
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
Leakage coming from the coolant changeover valve(s); two or more when applicable.
CORRECTION
Check all the changeover valves (if vehicle has more than one*) for a coolant leak (active) or previous
coolant leak (valve has residual coolant dried around it).
© 2026 BMW OF NORTH AMERICA, LLC. ALL RIGHTS RESERVED
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17 01 24_COOLANT LEAK AT CHANGEOVER VALVE
Check the production date of the remaining
changeover valves (1). Improved valves were
produced 18.1.2024 (January 18, 2024) and
later.
Replace any* changeover valves PN 64 11 9 462 114) with a production date older than 5.1.2024 (January
5, 2024).
(*) Possible number of changeover valves per model:
G26
G60
G70
i20
1
3
1
2
If no changeover valves are leaking, perform further diagnosis with ISTA and cooling system test equipment.
PROCEDURE
Important Warning for Working on the High-Voltage (HV) systems on BMW Group vehicles:
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 is found in Repair
Instruction 61 00… “Observe safety instructions when handling electric vehicles”.
Prior to disconnecting, or the removal of any HV component, the HV system needs to be disabled
and secured (by means of the HV Disconnect Switch) by a properly trained technician, Once the
vehicle’s HV system is disabled (the “Blitz” – lightning bolt icon displayed in instrument cluster, see
below).
High Voltage Battery removal and rework can be performed ONLY by a certified HV Specialist
Technician for the vehicle being repaired.
Replace the changeover valve(s), reference and use the appropriate repair instruction based on model
being repaired:
G26 and G70:
G60:
about:blank
Refer to Repair Instruction 64 12 790
Refer
to BMW
RepairOF
Instruction
12 790, 64LLC.
12 792
and
17 61 625
© 2026
NORTH64
AMERICA,
ALL
RIGHTS
RESERVED
2/6
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I20:
17 01 24_COOLANT LEAK AT CHANGEOVER VALVE
Refer to Repair Instruction 64 12 792 and 17 61 625
And for replacing the electric auxiliary heater(s):
All
G70:
Refer to Repair Instruction 64 12 821
Refer to Repair Instruction 64 12 831 (for the HV Battery)
Note: The special flat rate labor operation codes provided in the Claim information section addresses the
overlapping labor that is contained in these repair operations’ FRU allowances.
Perform a coolant system bleeding after repairs following ISTA path:
Vehicle management/Service functions/Electric drive/Cooling/Fill and bleed the cooling system.
Perform a functional check of the electric auxiliary heater following ISTA path:
Body/Heating and air conditioning functions/Electric auxiliary heater/Heating and air conditioning
functions: electric auxiliary heater
G70 only: Perform a functional check of the electric auxiliary heater for the high voltage battery following
ISTA path:
Electric drive/High-voltage battery unit/Electric auxiliary heater for high-voltage battery unit
Only replace the electric auxiliary heater if the test module instructs you to replace it.
Warning! Risk of scalding: Carry out the repair work on the cooling system only when the engine has
cooled down.
Important: Life-time coolant filling - Never reuse used coolant!
Installation note: Only use prescribed coolant that applies to the vehicle! Observe the mixture ratio!
For cooling system disassembly/replacement work related to plastic and/or rubber components only where a
partial quantity of coolant is drained, new coolant must be used to replenish the amount that was drained, up
to the top up/full level.
DO NOT OVERFILL THE COOLANT SYSTEM.
PARTS INFORMATION
To determine the part number(s) that applies to the specific vehicle being repaired, enter the VIN/chassis
number into either ETK or AIR, this will consider the specific equipment and/or options that are fitted to the
vehicle.
Part Number
Description
64 11 9 462 114
Changeover valve
And, if necessary:
Refer to AIR/ETK (MG
64)
Quantity
Up to 3*
as applicable
Elektrischer Durchlauferhitzer/Electric auxiliary heater
1
G70 (When necessary)
Part Number
Refer to AIR/ETK (MG
17)
Description
Electric auxiliary heater for HV battery (G70 only)
Quantity
1
© 2026 BMW OF NORTH AMERICA, LLC. ALL RIGHTS RESERVED
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17 01 24_COOLANT LEAK AT CHANGEOVER VALVE
Bulk Supply Materials - Sublet
Part Number
83 19 2 468 442
Or:
83 19 5 A32 851
Description
HT-12 Coolant (DN = 1 gallon concentrate)
HT-12 Antifreeze RTU (Bulk DN = 1/10 Liter) (Pre-mix)
Quantity
Sublet
Sublet
Additionally, other materials and small parts that are not specified above, such as fluids, lubricants, one-time
use screws, nuts, and seals, which must be replaced or installed (according to the ISTA repair
instructions/ETK/AIR), are to be selected from the Electronic Parts Catalogue, and/or other approved BMW
Group’s resources according to the respective vehicle type. Invoiced these items separately under the
Repair Code listed in this bulletin.
CLAIM INFORMATION
Covered under the terms of the BMW New Vehicle Limited Warranty for Passenger Cars and Light Trucks,
or the BMW Certified Pre-Owned Program as applicable below.
Repair Code:
6411900400
G26 G60 G70 I20 BEV Coolant loss at changeover valve
Below are the special flat rate labor operation code choices for this repair.
The vehicle is already in the workshop.
Work Pkg
#1
Labor Operation
Description (Plusposition work)
Labor Allowance
00 75 857
Checking the coolant level, reading out the
fault memory (includes carrying out vehicle
test, 00 00 556/61 21 528), replacing all
changeover valves as applicable, checking
the electric auxiliary heater.
As applicable
00 78 544
Additional work: Replacing the electric
auxiliary heater.
As applicable
00 78 545
Additional work: Replacing the electric
auxiliary heater for the high voltage battery
(G70 only).
As applicable
Expanded WP A
If applicable
Expanded WP B
If applicable
Or:
The vehicle arrives at your center for this repair (No other Main work will be performed or claimed
during this workshop visit).
Work Pkg
#2
Labor
Operation
Description (Main work)
Labor Allowance
00 75 272
Checking the coolant level, reading out the
fault memory (includes carrying out vehicle
test, 00 00 006/61 21 528), replacing all
changeover valves as applicable, checking
the electric auxiliary heater.
As applicable
00 78 544
Additional work: Replacing the electric
auxiliary heater.
As applicable
Expanded WP A
If applicable
Expanded WP B
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© 2026 BMW OF NORTH AMERICA, LLC. ALL RIGHTS RESERVED
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If applicable
17 01 24_COOLANT LEAK AT CHANGEOVER VALVE
00 78 545
Additional work: Replacing the electric
auxiliary heater for the high voltage battery
(G70 only).
As applicable
Only one Main work flat rate labor operation code can be claimed per workshop visit.
Claim Repair Comments
Reference the SIB number, the issue (briefly), and the work package (WP) number performed in the technician’s RO notes,
and in the claim comments (For example: B17 04 24 Replace the changeover valves WP 1), unless otherwise required by
State law.
Additionally, when applicable, add comments to support the replacement of the electric auxiliary heater(s).
Sublet – Bulk Supply Materials (RO and Claim Comments Required)
Sublet Code 4
Reimbursement for the repair-related bulk supply material
(Do not use the BMW part number for claim submission)
Up to $100.00
Sublet reimbursement calculation for claiming the applicable repair-related bulk supply material (BMW part
number) is at the dealer net (DN) price for the full or proportional quantity used plus your center’s handling.
BMW Antifreeze/Coolant: Claim the corresponding sublet dollar amount for the quantity needed to replace
what was drained. The one-gallon concentrate part number quantity for a 50/50 coolant/water solution.
Enter this material cost in sublet and itemize the amount on the repair order and in claim comment section.
BMW Group’s AIR Application Resource for Flat Rate Labor Operation Codes
To obtain the corresponding flat rate unit (FRU) allowance information from the BMW Group AIR application
resource, start by entering the Chassis Number (last seven (7) characters of the VIN), and click on the
“Search” icon. If the “Vehicle Selection” window displays two or more model possible vehicle choices, select
the applicable Model, or enter the full VIN (17 characters) instead to proceed. Click on the “Flat Rate Units”
button and enter a flat rate labor operation code number “without spaces” in the field to the right, click on the
“Search” icon to display the corresponding listing of “Flat rate unit group details” that are available and their
corresponding FRU allowances.
FEEDBACK REGARDING THIS BULLETIN
Technical Feedback
Warranty Feedback
Parts Feedback
To submit feedback for the technical topic of this bulletin: Submit your
feedback in the rating box at the top of this bulletin
To submit feedback for the CLAIMS section of this bulletin: Submit an IDS
ticket to the Warranty Department, or use the chat available in the
Warranty Documentation Portal
To submit feedback for the PARTS section of this bulletin: Submit an IDS
ticket to the Parts Department
Supporting Materials
picture_as_pdf B17 01 24_AT_1 Valve Locations.pdf
© 2026 BMW OF NORTH AMERICA, LLC. ALL RIGHTS RESERVED
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17 01 24_COOLANT LEAK AT CHANGEOVER VALVE
© 2026 BMW OF NORTH AMERICA, LLC. ALL RIGHTS RESERVED
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Attachment 1 to SI B17 01 24
March, 2025
COOLANT LEAK AT CHANGEOVER VALVE
CHANGEOVER VALVE LOCATIONS
G26
1
G60 Valves 1 & 2
G60 Valve 3
2
G70
I20 Valve 1
3
I20 Valve 2
G70 Aux Heater for HV Battery
4
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