NHTSA ID Number: 11016997
Manufacturer Communication Number: 25-EV-002H TSB
TSB/Document Date: 2025-04-15
Summary
Certain 2025MY IONIQ 5 (NEA EV) vehicles may experience a charging issue where a voltage difference between battery cells prevents the High Voltage Battery
from fully charging. The two DTCs associated with this issue are: • P1AA700 – Hybrid/EV Battery Abnormal Performance: Cell Voltage Deviation • P1AD300 – Hybrid/EV Battery Abnormal Performance: MISD. If either of the DTCs listed above are identified in "Active" status, follow the procedure outlined in this TSB to replace the Battery System Assembly (BSA).
GROUP
NUMBER
EV SYSTEMS
Technical Service Bulletin
SUBJECT:
DATE
APRIL 2025
25-EV-002H
MODEL(S)
IONIQ 5 (NEA EV)
HV BATTERY INSPECTION & REPLACEMENT
Description: Certain 2025MY IONIQ 5 (NEA EV) vehicles may experience a charging issue where a
voltage difference between battery cells prevents the High Voltage Battery from fully charging. The two
DTCs associated with this issue are:
• P1AA700 – Hybrid/EV Battery Abnormal Performance: Cell Voltage Deviation
• P1AD300 – Hybrid/EV Battery Abnormal Performance: MISD.
If either of the DTCs listed above are identified in "Active" status, follow the procedure outlined in this
TSB to replace the Battery System Assembly (BSA).
Applicable Vehicles:
• 2025MY IONIQ 5 (NEA EV) produced from 12/10/2024 - 04/08/2025 (VIN starts with '7YA')
NOTICE
To avoid any potential damage to IONIQ vehicles, IONIQ repairs can only be performed at IONIQ
certified dealers.
Parts Information:
Model
Part Name
Part Number
BSA –
Long Range
37501-PI050
BSA –
Short Range
37501-PI150
Figure
IONIQ 5
(NEA EV)
Circulate To: General Manager, Service Manager, Parts Manager, Warranty Manager, Service
Advisors, Technicians, Body Shop Manager, Fleet Repair
HV BATTERY INSPECTION & REPLACEMENT
SUBJECT:
Model
Part Name
Part Number
37535-GI050
Figure
(QTY 8 REQUIRED)
IONIQ 5
(NEA EV)
37535-GI500
(QTY 18 REQUIRED)
Pink-Antifreeze
/Coolant
00232-19098
(QTY 2)
Warranty Information:
Model
Op. Code
Operation
Op.
Time
50DV03R0
IONIQ 5
(NEA EV)
Nature
Code
Cause
Code
W11
ZZ3
37501-PI050
Battery Inspection &
Replacement
50DV03R1
Causal Part
2.9 M/H
37501-PI150
NOTE 1: Submit claim on Claim Entry Screen as “Campaign” type.
NOTE 2: This TSB contains repair validation photo(s). Op times include VIN, Mileage, and Repair
validation photo (s) as outlined in the Digital Documentation Policy
NOTE 3: The incident parts are subject to callback through the normal Warranty Technical Center
(WTC) parts return process. Claim is subject to debit if the part is not returned.
NOTE 4: If a part is found in need of replacement while performing this TSB and the affected part is
still under warranty, submit a separate claim using the same repair order. If the affected part is out of
warranty, submit a Prior Approval request for goodwill consideration prior to performing the work.
NOTE 5: If DTC P1AA700 and/or P1AD300 are confirmed in "active" status, a submission of current
BMS data and Freeze Frame data will be required for Techline review prior to placing an order for
replacement BSA.
NOTE 6: Dealer will be reimbursed with 2 gallons of coolant under both op codes.
TSB #: 25-EV-002H
Page 2 of 4
SUBJECT:
HV BATTERY INSPECTION & REPLACEMENT
Service Procedure:
DIGITAL DOCUMENTATION
This TSB includes Repair validation photos. Refer to the latest Warranty Digital Documentation
Policy for requirements.
NOTICE
Applying the recommended torque to all fasteners is essential to reduce potential issues from
occurring after the service procedure.
!
WARNING
When working on the high voltage system, ensure to read and comply with the "Safety
Precautions, Cautions and Warnings". Failure to comply with the safety instructions may result
in serious accidents due to electric shock or leakage.
When working on the high voltage system, ensure to cut off the high voltage first per the “High
Voltage Cut-off Procedure". Failure to comply with the safety instructions may result in serious
accidents due to electric shock or leakage.
1.
2.
Connect GDS and perform a Fault Code
Search on the BMS system:
• If P1AA700 and/or P1AD300 are active,
then submit BMS and Freeze Frame
data as a Techline case.
• If neither DTCs are NOT listed, then
perform troubleshooting.
o This TSB does NOT apply.
DIGITAL
DOCUMENTATION
Using STUI, take a photo of the
installed BSA's part label with the last
6 digits of the VIN and the date of the
repair on a piece of paper.
Upload the photo to STUI.
TSB #: 25-EV-002H
Page 3 of 4
HV BATTERY INSPECTION & REPLACEMENT
SUBJECT:
3.
Replace the BSA (A) by referring to the shop
manual:
• Battery Control System > High
Voltage Battery System > Battery
System Assembly (BSA) >
Removal / Installation
NOTICE
Ensure the one-time bolts are replaced
per the shop manual procedures.
A
A
Applying the recommended torque to all
fasteners is essential to reduce potential
issues from occurring after the service
procedure.
4.
The service procedure is now complete.
TSB #: 25-EV-002H
Page 4 of 4
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TSB/Document ID: 25-EV-002H TSB
Replacement Service Bulletin Number:
MFR Communication Date: 2025-04-12
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: FUEL/PROPULSION SYSTEM
MFR Component System:
MFR Component Subsystem:
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