NHTSA ID Number: 11028002
Manufacturer Communication Number: TSB_ELE399_R1
TSB/Document Date: 2026-02-02
Summary
TECHNICAL SERVICE BULLETIN: BMS DISCHARGE LOGIC IMPROVEMENT - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information to upgrade the ‘BMS’ system software on certain 2023-2024MY Sportage HEV (NQ5 HEV) vehicles produced from February 15, 2022, through December 15, 2023, which may experience excessive discharging of the 12V lithium battery while parked, potentially resulting in a no-start condition.
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TSB/Document ID: TSB_ELE399_R1
Replacement Service Bulletin Number:
MFR Communication Date: 2026-01-23
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System: ELE
MFR Component Subsystem:
Previous TSB | Next TSB |
GROUP
MODEL
ELE
2023-2024MY
Sportage HEV
(NQ5 HEV)
NUMBER
DATE
399 (Rev 1, 01/23/2026)
September 2025
TECHNICAL SERVICE BULLETIN
SUBJECT:
BMS DISCHARGE LOGIC IMPROVEMENT
NOTICE
This bulletin has been revised to include additional information. New/revised sections of this
bulletin are indicated by a black bar in the margin area.
This bulletin provides information to upgrade the ‘BMS’ system software on certain 2023-2024MY Sportage
HEV (NQ5 HEV) vehicles produced from February 15, 2022, through December 15, 2023, which may
experience excessive discharging of the 12V lithium battery while parked, potentially resulting in a no-start
condition. Follow the procedure outlined in this publication to improve the discharge prevention logic for the
12V lithium battery. Refer to SST081 for software upgrade instructions using Kia Diagnostic System (KDS)
tablet and VCI-II and confirm the Upgrade Event Number/Name, ROM ID Information, and Manual Mode
passwords (if applicable) on the applicable vehicle.
NOTICE
A Technical Service Bulletin is a field fix repair program without customer notification that may be
performed during the warranty period. Any dealer requesting to perform this repair outside the
warranty period will require DPSM approval.
A printed copy is for reference only; publication information can be updated at any time.
Always refer to KGIS for the latest information. After logging in kdealer.com, the newest technical
publications are listed in ‘Service Releases’ and has the latest service information that has been released.
Page 2 of 5
BMS DISCHARGE LOGIC IMPROVEMENT
SUBJECT:
Refer to TSB SST081 for instructions to upgrade the ‘BMS’ system:
To correct this condition, the specified system module should be reprogrammed using KDS
as described in this bulletin in ‘Auto Mode’
Upgrade Event Name
824.NQ5 HEV BMS discharge logic improvement (Battery Saver Conditions) - 3rd
NOTICE
•
Confirm a fully charged battery (12.3 volts or higher is necessary) is used or utilize a full charged
jump starter box connected to the battery.
•
Ensure the KDS GDS is sufficiently charged at 60% or higher prior to reflash.
•
All ECU upgrades must be performed with the ignition set to the ‘ON’ position unless otherwise
stated.
•
Damage VCI-II units should not be used and promptly replaced.
•
Be careful not to disconnect the VCI-II connected to the vehicle during the ECU upgrade
procedure.
•
DO NOT start the engine during ECU upgrade.
•
DO NOT turn the ignition key ‘OFF’ or interrupt the power supply during ECU upgrade.
•
When the ECU upgrade is completed, turn the ignition ‘OFF’ and wait 10 seconds before starting
the engine.
•
ONLY use approved ECU upgrade software designated for the correct application.
Connect the negative (-) terminal to the battery as shown below.
NOTICE
Before attempting an ECU upgrade on any Kia model, make sure to first determine whether the
applicable model is equipped with an immobilizer
security system. Failure to follow proper
procedures may cause the PCM to become inoperative after the upgrade and any claims associated
with this repair may be subject to chargeback.
Printed document copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.
TSB: ELE399 (Rev 1) Sportage (NQ5 HEV) September 2025
Page 3 of 5
BMS DISCHARGE LOGIC IMPROVEMENT
SUBJECT:
ROM ID Information Table:
IMPORTANT
It is recommended to ALWAYS check the Electronic Parts Catalog (EPC) to locate the ECU Part
Number respective to Auto/Manual Mode ROM IDs. DO NOT reference the parts label affixed to
the ECU.
Upgrade Event #824 (NQ5 HEV)
Model
System
IMMO
ECU P/No.
ROM ID
Previous
New
6080
BMS
NQ5
HEV
Management
System)
6100
Yes
37513 CH000
6120
6180
6140
6160
To verify the vehicle is affected, be sure to check the Calibration Identification of the vehicle's ECM ROM ID
and reference the Information Table as necessary.
Printed document copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.
TSB: ELE399 (Rev 1) Sportage (NQ5 HEV) September 2025
Page 4 of 5
BMS DISCHARGE LOGIC IMPROVEMENT
SUBJECT:
Software Information:
CAUTION
It is highly recommended to connect a 12V battery charger to the vehicle during the upgrade
procedure to prevent discharge of the 12V battery.
The required software must be installed by selecting
the ‘Auto Mode’ ECU Upgrade option.
Note: In some case, the ‘Manual Mode’ installation
option may be required ONLY if the ‘Auto Mode’
function fails or is otherwise noted above.
NOTICE
- If the automatic upgrade fails, turn the ignition ‘OFF’ for about 10 seconds then place it back in the ‘ON’
position to reset the control unit BEFORE performing the manual upgrade.
- After the upgrade is completed, a 30-second IG-OFF period is required to finalize the procedure.
‘Manual Mode’ passwords.
Menu
Password
824.NQ5 HEV BMS discharge logic improvement (Battery Saver Conditions) - 3rd
UPGRADE EVENT:
Select the applicable ‘824’ system module and the
Event Group.
•
824.NQ5
HEV
BMS
discharge
logic
improvement (Battery Saver Conditions) 3rd
Verify the affected vehicle Calibration Identification of
the applicable ECU ROM ID and reference the
Information Table on page 3 as necessary.
Printed document copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.
TSB: ELE399 (Rev 1) Sportage (NQ5 HEV) September 2025
7513
Page 5 of 5
BMS DISCHARGE LOGIC IMPROVEMENT
SUBJECT:
AFFECTED VEHICLE RANGE:
Model
Production Date Range
Sportage (NQ5 HEV)
February 15, 2022 to December 15, 2023
REQUIRED TOOL:
Tool Name
Part Number
Kia Diagnostic System
Figure
Comments
N/A
(KDS)
KDS + VCI
WARRANTY INFORMATION:
N Code: N99 Code: C99
Model
NQ5
HEV
Claim
Causal
Type
P/N
W
37513
CH000
Qty.
0
Repair
Labor Op
Op
Replacement
Description
Code
Time
P/N
BMS Discharge
Logic Improvement
37513F40
0.3
M/H
N/A
Qty.
0
Note: For Substitute Transportation policy, please refer to Service Policy and Procedures Manual
(SPPM) 6.11 “Kia Substitute Transportation”.
Printed document copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.
TSB: ELE399 (Rev 1) Sportage (NQ5 HEV) September 2025
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