# Service bulletin SC325\_TSB\_R1

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 11029043
- Published by NHTSA: 2026\-02\-26
- Manufacturer's number: SC325\_TSB\_R1
- Manufacturer's date: 2026\-02\-20
- Campaign id or software version: SC325
- NHTSA component: ENGINE; ELECTRICAL SYSTEM

## NHTSA's summary

TECHNICAL SERVICE BULLETIN: VOLUNTARY EMISSIONS SERVICE CAMPAIGN: AEWP INSPECTION AND REPLACEMENT \(SC325\) \- 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 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 2022\-2023MY Kia Hybrid and Plug\-in Hybrid vehicles listed in the table below. 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.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11029043-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11029043-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Electrical system, Engine

## Vehicles listed

- 2022 to 2023 KIA NIRO
- 2022 to 2023 KIA NIRO PHEV
- 2022 to 2023 KIA SORENTO HYBRID
- 2022 to 2023 KIA SORENTO PHEV
- 2023 KIA SPORTAGE HYBRID
- 2023 KIA SPORTAGE PHEV

## Recalls for the same vehicles and component

- [25V874000](/recalls/nhtsa/25V874000.md), 2025-12-17: TRAILER HITCHES; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
- [25V649000](/recalls/nhtsa/25V649000.md), 2025-09-25: VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:FAN/MOTOR; ELECTRICAL SYSTEM:WIRING:FUSES AND CIRCUIT BREAKERS
- [25V024000](/recalls/nhtsa/25V024000.md), 2025-01-17: SEATS; ELECTRICAL SYSTEM:WIRING
- [24V358000](/recalls/nhtsa/24V358000.md), 2024-05-21: ELECTRICAL SYSTEM:PROPULSION SYSTEM:SHOCK PROTECTION
- [23V298000](/recalls/nhtsa/23V298000.md), 2023-04-26: ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
- [2022500](/recalls/tc/2022500.md), 2022-09-07: Electrical
- [22V651000](/recalls/nhtsa/22V651000.md), 2022-08-29: ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR
- [22V202000](/recalls/nhtsa/22V202000.md), 2022-03-29: ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER; ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION:PIPES, HOSES, AND FITTINGS

## Other bulletins for the same vehicles and component

- [TSB\_CLI049\_R2](/bulletins/11036628.md), 2026-09-02, Service bulletin: ELECTRICAL SYSTEM; VISIBILITY/WIPER. TECHNICAL SERVICE BULLETIN: PARTIAL REPAIR – ELECTRICAL A/C COMPRESSOR \- 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 regarding the partial repair of the Air Conditioning \(A/C\) compressor assembly on some 2011MY\~ Optima Hybrid \(TF HEV, JF HEV/PHEV\), 2015MY\~ Soul EV \(PS EV\), 2017MY\~ Niro \(DE HEV/PHEV/EV\), 2022MY\~ EV6 \(CV\), 2021MY\~ Sorento \(MQ4 HEV/PHEV\), 2023MY\~ Sportage \(NQ5 HEV/PHEV\), and 2023MY\~ Niro \(SG2 EV/HEV/PHEV\) vehicles.
- [TSB\_ELE426](/bulletins/11036390.md), 2026-08-27, Service bulletin: ELECTRICAL SYSTEM. TECHNICAL SERVICE BULLETIN: AVN GEN 5.0 WIDE SOFTWARE UPDATE \- This bulletin provides information on the Audio Video Navigation \(AVN\) system software update for certain vehicles equipped with AVN5W and Navigation System listed in the table below. Affected vehicles may overestimate travel times during route calculation.
- [TSB\_ELE416](/bulletins/11035254.md), 2026-07-28, Service bulletin: ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM. TECHNICAL SERVICE BULLETIN: ON\-BOARD CHARGER INSPECTION AND REPLACMENT \(SA644\) \- This bulletin provides information related to charging system diagnosis and repair on certain Sportage \(NQ5 PHEV\) vehicles produced from December 13, 2022 through May 30, 2023. The affected vehicles may experience interrupted or inoperative high‑voltage battery charging due to an on‑board charger \(OBC\) internal malfunction. As a result, charging of the high\-voltage battery may be interrupted or unavailable, with several diagnostic trouble codes \(DTCs\) stored related to the OBC unit. If this occurs, the vehicle can still be driven by the internal combustion engine.
- [PI2603\_TSB](/bulletins/11033933.md), 2026-06-17, Service bulletin: FUEL/PROPULSION SYSTEM; ELECTRICAL SYSTEM. TECHNICAL SERVICE BULLETIN: PRODUCT IMPROVEMENT CAMPAIGN: BMS BATTERY DIAGNOSTIC LOGIC IMPROVEMENT \(PI2603\) \- This bulletin provides information regarding a Battery Management System \(BMS\) software update for certain 2020–2022MY Niro \(DE EV\) vehicles produced from June 2, 2020, through November 8, 2021. Kia has developed improved battery health monitoring software to enhance the BMS diagnostic performance of the high\-voltage battery \(HVB\) cells produced by a specific supplier in the subject vehicles. This improved software will enhance the long\-term issue detection capabilities of the high\-voltage battery in the subject vehicles.
- [PI2603\_OWNR](/bulletins/11033932.md), 2026-06-17, Other: ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM. PRODUCT IMPROVEMENT CAMPAIGN: OWNER NOTIFICATION \(PI2603\) \- This document is the owner notification advising that Kia is conducting a Product Improvement Campaign to update the battery management system \(BMS\) software to enhance battery diagnostic performance in certain 2020\-2022 MY Niro EV vehicles.
- [PI2603\_QA](/bulletins/11033931.md), 2026-06-17, Other: ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM. PRODUCT IMPROVEMENT CAMPAIGN: QUESTION AND ANSWER \(PI2603\) \- This document is the Question and Answer Guide containing the most frequently asked questions regarding the Product Improvement Campaign PI2603.
- [PI2603\_DPSM](/bulletins/11033930.md), 2026-06-17, Other: FUEL/PROPULSION SYSTEM; ELECTRICAL SYSTEM. PRODUCT IMPROVEMENT CAMPAIGN: DEALER PARTS AND SERVICE MANAGER MEMO \(PI2603\) \- This document is the announcement to the dealer Parts and Service managers advising that Kia is conducting a Product Improvement Campaign to update the battery management system \(BMS\) software to enhance battery diagnostic performance in certain 2020\-2022 MY Niro EV vehicles manufactured from June 2, 2020 through November 8, 2021.
- [PI2603\_DP](/bulletins/11033929.md), 2026-06-17, Other: ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM. PRODUCT IMPROVEMENT CAMPAIGN: DEALER PRINCIPAL MEMO \(PI2603\) \- This document is the announcement to the dealer principals advising that Kia is conducting a Product Improvement Campaign to update the battery management system \(BMS\) software to enhance battery diagnostic performance in certain 2020\-2022 MY Niro EV vehicles manufactured from June 2, 2020 through November 8, 2021.
- [TSB\_ELE422](/bulletins/11033217.md), 2026-06-03, Service bulletin: ELECTRICAL SYSTEM. TECHNICAL SERVICE BULLETIN: INFOTAINMENT SYSTEM SOFTWARE UPDATE USING UPDATE.KIA.COM \- This bulletin provides information and service procedures for updating the infotainment systems on applicable Kia vehicles using the Kia Navigation Updater available at update.kia.com. The software update may improve system performance, enhance existing features, and apply the latest operating software for supported vehicles \(2021\-2026MY All Models\).
- [TSB\_ELE417](/bulletins/11031906.md), 2026-05-01, Service bulletin: ELECTRICAL SYSTEM. TECHNICAL SERVICE BULLETIN: INFOTAINMENT SOFTWARE UPDATE PROCEDURE \- This bulletin provides information on the process for downloading infotainment software updates and preparing USB for installation on applicable Kia vehicles. The software downloads and USB preparation process is similar across all supported platforms; however, in‑vehicle installation procedures vary by head unit type.

JSON: [/v1/bulletins/11029043](/v1/bulletins/11029043)

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