NHTSA ID Number: 11014236
Manufacturer Communication Number: SC325_TSB
TSB/Document Date: 2025-02-12
Summary
TECHNICAL SERVICE BULLETIN: VOLUNTARY SERVICE CAMPAIGN: AEWP INSPECTION AND REPLACEMENT (SC325) - This bulletin provides information to inspect and, if necessary, replace the Auxiliary Electric Water Pump (AEWP), control harness wiring, and/or engine room junction box for coolant intrusion and/or corrosion on certain 2023MY Niro Hybrid
(HEV) and Plug-in Hybrid (PHEV), 2023MY Sportage HEV/PHEV, and 2022-2023MY Sorento HEV/PHEV Kia vehicles listed in this bulletin. The AEWP in the subject vehicles may crack internally and allow coolant to intrude into the AEWP circuitry. If coolant enters the AEWP circuitry, the Check Engine Light (CEL) may be illuminated with one or more DTCs listed on page 2. If the vehicle continues to be driven in this condition, the Active Air Flap (AAF) warning message can also activate, and coolant may eventually migrate through the wiring harness to the engine room junction block. This may result in a reduction of motive power and may cause the vehicle to release air pollutants which exceeds Federal and California standards. These standards were established to protect the public health and welfare from the dangers of air pollution.
Install the new control harness assembly (C) in
the reverse order of removal.
Printed TSB copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.
Kia America, Inc.
TSB: SC325 Multiple Models February 2025
Page 8 of 13
SUBJECT:
AEWP INSPECTION AND REPLACEMENT (SC325)
ATTENTION: THE PROOF OF CORRECTION CARD AND CAMPAIGN COMPLETION LABEL ARE
RESTRICTED ONLY TO DEALERS IN THE FOLLOWING STATES:
California, Connecticut, Delaware, Massachusetts, Maine, Maryland, New Jersey, New York, Oregon,
Pennsylvania, Rhode Island, Vermont, and Washington. See Parts Information below to order the Proof of
Correction Card and Campaign Completion Label from the PDC.
VEHICLE EMISSION RECALL - PROOF OF CORRECTION CARD
A Vehicle Emission Recall - Proof of Correction card must be filled out for all vehicles registered in California,
Connecticut, Delaware, Massachusetts, Maine, Maryland, New Jersey, New York, Oregon, Pennsylvania,
Rhode Island, Vermont, and Washington. Residents of these states, who own an affected vehicle, will be
required to possess a Vehicle Emission Recall - Proof of Correction card as evidence of voluntary service
campaign completion, when they apply for vehicle registration renewal.
WHAT TO DO WITH THE CARD:
The Vehicle Emission Recall - Proof of Correction card must be completed by the Dealership's Service Manager
using a permanent ink pen. A fine point pen is recommended. When filling in the information, copy the
information directly from the vehicle, not the repair order. ALL INFORMATION MUST BE PRINTED AND NEAT.
NOTE: DO NOT COMPLETE THE CARD UNLESS THE SERVICE CAMPAIGN WORK IS COMPLETED.
The copy of the card shown below indicates the areas to be filled in. Each area must be filled in. The completed
card should be given to the owner of the vehicle upon completion of the Campaign and placement of the
Campaign Completion Label outlined below…
SC325
SC325
FILLING OUT AND APPLYING THE CAMPAIGN COMPLETION LABEL (CA and S.177 STATES ONLY):
The dealer must fill in the Dealer Code and Date information fields on the Campaign Completion Label.
Once complete, affix the campaign completion label under the hood of the vehicle, as shown below.
CA and S.177 States Only: Apply SC325 Campaign
SC325
Completion Label onto the body in the area next to
Dealer Code:
the shock tower, as shown. NOTE: Be sure to clean
Date:
the mounting surface to ensure proper label
adhesion.
Printed TSB copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.
TSB: SC325 Multiple Models February 2025
Kia America, Inc.
UT160 SC325
Page 9 of 13
AEWP INSPECTION AND REPLACEMENT (SC325)
SUBJECT:
AFFECTED VEHICLE RANGE:
Model
Production Date Range
Sorento HEV, PHEV (MQ4 P/HEV)
March 02, 2022 – December 27, 2022
Sportage HEV, PHEV (NQ5 P/HEV)
March 02, 2022 – January 04, 2023
Niro HEV, PHEV (SG2 P/HEV)
June 21, 2022 – April 26, 2023
REQUIRED PART:
Model
Part Name
MQ4 HEV
NQ5 PHEV
Figure
Qty.
25160 2MHX1QQK
NQ5 HEV
MQ4 PHEV
Part Number
AEWP Assembly with
Extension Harness
SG2 (P)HEV
1
25160 2MHY1QQK
25100 08HB0QQK
91400 P4231QQK
91400 P4060QQK
MQ4 HEV
91400 P4061
91400 P4311
TBD
91400 P4080QQK
MQ4 PHEV
91400 P4261
91400 P4371
Control Harness
91400 CH020QQK
N/A
1
91400 CH050QQK
NQ5 HEV
91400 CH090
91400 CH100
91410 CH010
NQ5 PHEV
91410 CH040
SG2 HEV
91400 AT100QQK
SG2 PHEV
91400 AT130QQK
MQ4 (P)HEV
91959 P2200
NQ5 (P)HEV
PCB Block
SG2 (P)HEV
ALL
1
91959 AT010
Coolant (Concentrate)
Campaign
Completion Label
ALL
91959 P1200
UM022 CH271
N/A
1
UT160 SC325
1
UT161 SC325
1
Vehicle Emissions
Recall Proof of
Correction Card
Note: PCB Blocks and some configurations of Control Harness ARE NOT provided with QQK. Order those
parts by general part number** in case the part needs to be replaced. Mandatory Parts Return is required for
inspections resulting in ‘NG’ result. All claims are subject to Warranty review and chargeback.
Printed TSB copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.
Kia America, Inc.
TSB: SC325 Multiple Models February 2025
Page 10 of 13
AEWP INSPECTION AND REPLACEMENT (SC325)
SUBJECT:
WARRANTY INFORMATION:
N Code: N99 C Code: C99
Model
ALL
Claim
Causal
Type
P/N
R
25160
2MHX1
Qty.
0
Repair
Labor Op
Op
Replacement
Description
Code
Time
P/N
(SC325)
DTC Inspection (OK)
N/A
240222R0
HEV
MQ4
0
1
1.6
UM022 CH271
M/H
25160 2MHY1QQK
240222R1
PHEV
HEV
0.2
M/H
25160 2MHX1QQK
MQ4
NQ5
240222I0
Qty.
25160
(SC325)
2MHX1
DTC Inspection (NG)
R
0
NQ5
+ AEWP Connector
1
UM022 CH271
25160 2MHX1QQK
240222R2
1
Inspection (OK)
1.6
+ AEWP Replacement
M/H
UM022 CH271
25160 2MHY1QQK
240222R3
PHEV
1
UM022 CH271
SG2
25490
P/HEV
08HA0
240222R4
1.5
M/H
25100 08HB0QQK
1
UM022 CH271
25160 2MHX1QQK
1
(SC325)
DTC Inspection (NG)
MQ4
25160
HEV
2MHX1
0
91400 P4231QQK
+ AEWP Connector
or
Inspection (NG)
91400 P4060QQK
+ Control Harness
Inspection (OK)
240222R5
3.0
M/H
or
1
91400 P4061
+ AEWP Replacement
or
+ Control Harness
91400 P4311
Replacement
UM022 CH271
Continued on page 11.
Printed TSB copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.
TSB: SC325 Multiple Models February 2025
Kia America, Inc.
1
Page 11 of 13
AEWP INSPECTION AND REPLACEMENT (SC325)
SUBJECT:
WARRANTY INFORMATION:
N Code: N99 C Code: C99
Model
Claim
Causal
Type
P/N
Qty.
Repair
Labor Op
Op
Replacement
Description
Code
Time
- Unsurpassed freeze protection and anti-boil performance...
- Organic acid technology resists rust, scale & corrosion...
- High-quality additives protect against leaks and won’t...
- Pre-mixed orange formula is ready-to-use in a 50/50 ratio...
- 5 year/150,000 mile guarantee protects against engine...
- Formulated to replace the OEM fluid in Asian make vehicles...
- 5 year/150, 000 mile . Silicate-free, long-life, phosphate...
- The long life formula provides protection for all cooling...
- Meets the following OEM and industry specifications: JIS K...
- Note: Please check the vehicle specification before...
Last update on 2026-06-23 / Affiliate links / Images from Amazon Product Advertising API
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TSB/Document ID: SC325_TSB
Replacement Service Bulletin Number:
MFR Communication Date: 2025-02-07
MFR Internal Campaign ID/Software Version: SC325
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System:
MFR Component Subsystem:
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