# Service bulletins for the 2023 Kia Niro

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.

87 bulletins from NHTSA, as of 2026-10-19.

- [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\_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\_ELE394](/bulletins/11030345.md), 2026-03-31, Service bulletin: ELECTRICAL SYSTEM. TECHNICAL SERVICE BULLETIN: AVN5.0W DTC P17A000 DAIGNOSTIC PROCEDURE \- This bulletin provides information regarding a potential illuminated Malfunction Indicator Lamp \(MIL\) accompanied by DTC P17A000 on some 2022\-2025MY Hybrid Electric Vehicles \(HEV\) and Plug\-In Hybrid Electric Vehicles \(PHEV\) equipped with AVN5.0Wide head units listed below. This condition occurs when the Global Positioning System \(GPS\) module within the Audio Video Navigation \(AVN\) head unit, sends an inaccurate signal to the Hybrid Power Control Unit \(HPCU\), causing the DTC to set. There are no drivability symptoms associated with this condition.
- [SC325\_TSB\_R1](/bulletins/11029043.md), 2026-02-26, Service bulletin: ENGINE; ELECTRICAL SYSTEM. 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.
- [PS797](/bulletins/11026698.md), 2025-12-18, Other: BACK OVER PREVENTION: WARNINGS. PITSTOP: TECHNICAL OPERATIONS: EXTERNAL DAMAGE TO ULTRASONIC SENSOR: This Pitstop provides information related to Parking Distance Warning \(PDW\) alerts and repairs involving ultrasonic sensors. The PDW system alerts the driver while parking, by calculating distance based on the difference in signal transmission and reception times between the vehicle \(ultrasonic sensor\) and an object. The membrane film of the ultrasonic sensor is used for object detention and can be damaged by stone chips or foreign substances while driving. Damage to the cover of the ultrasonic sensor can also lead to damage to the internal circuit. As a result of this external damage, the PDW system may not receive the proper signal from the ultrasonic sensor. In some cases, the system may cause a false alarm, no alert, or phantom warnings by a “Warning Lamp’ to be displayed on the cluster. The ultrasonic sensor membrane film should be always inspected for external damage and if any part replacement should be treated as a general repair, not as a warranty claim repair for this concern. \(Please note that this Pitstop only applies to models/trims that are equipped with the ultrasonic sensors.\)
- [TSB\_GEN099\_R3](/bulletins/11024692.md), 2025-11-01, Service bulletin: WHEELS. TECHNICAL SERVICE BULLETIN: SERVICE ACTION: TIRE MOBILITY KIT INSPECTION \& REPLACEMENT/ REPAIR \(SA556\) \- 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 Tire Mobility Kit \(TMK\) sealant can or sealant can cap on certain 2023\-2024MY Kia vehicles listed on page 5. Lower ambient temperatures can create a vacuum effect inside the TMK sealant can, causing the sealant can cap to open, resulting in the tire sealant leaking.
- [SC345Z\_TSB](/bulletins/11024346.md), 2025-10-17, Service bulletin: POWER TRAIN. TECHNICAL SERVICE BULLETIN: SUBSEQUENT REPAIR ACTION: FRONT MOTOR REDUCTION GEAR ASSEMBLY REPLACEMENT \(SC345Z\) \- This bulletin provides information regarding grinding or whining noise coming from the front motor reduction gear assembly after replacing the oil under SC345 \(published in August 2025\) on certain 2023\-2024MY Niro EV \(SG2 EV\) vehicles produced from December 12, 2022 through February 7, 2024 and EV6 \(CV\) vehicles produced from December 14, 2022 through February 22, 2024. In rare cases, the front motor reduction gear assembly may exhibit noise after having the oil replaced.
- [SC338\_OWNR\_SG2\_102](/bulletins/11023098.md), 2025-09-11, Emissions: FUEL/PROPULSION SYSTEM; ELECTRICAL SYSTEM. VOLUNTARY EMISSIONS SERVICE CAMPAIGN: OWNER NOTIFICATION: EXPANSION \(SC338 Flight 102\) \- This document is the owner notification advising that Kia is conducting a Voluntary Emissions Service Campaign to update the battery management system \(BMS\) to prevent overcharging of the 12V Lithium battery in certain 2023 MY Niro Hybrid \(HEV\) vehicles to ensure compliance with emissions regulations.
- [TSB\_SC338\_R1](/bulletins/11022364.md), 2025-09-03, Emissions: FUEL/PROPULSION SYSTEM; ELECTRICAL SYSTEM. TECHNICAL SERVICE BULLETIN: VOLUNTARY EMISSIONS SERVICE CAMPAIGN: BMS S/W LOGIC IMPROVEMENT FOR DTC P1BB2 \(SC338\) \- 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 Battery Management System ‘BMS’ software logic on certain 2023\-2024MY Sportage HEV \(NQ5 HEV\) vehicles produced from February 15, 2022 to December 15, 2023, and 2023MY Niro HEV \(SG2 HEV\) vehicles produced from June 21, 2022 through April 25, 2023. Due to a software issue, the Battery Management System \(BMS\) may inadvertently overcharge the 12V Lithium battery. If the 12V Lithium battery becomes overcharged, the subject vehicles may experience a reduction in motive power accompanied by the ‘Check Hybrid System, Stop Safely’ warning message, Hybrid system warning lamp, Service warning lamp, Charging system warning lamp, and a rapid beeping sound for approximately ten \(10\) seconds. \(Note: This Voluntary Emissions Service Campaign supersedes SC335\).
- [SC345\_TSB](/bulletins/11022351.md), 2025-09-02, Service bulletin: POWER TRAIN. TECHNICAL SERVICE BULLETIN: VOLUNTARY SERVICE CAMPAIGN FRONT MOTOR REDUCTION GEAR OIL REPLACEMENT \(SC345\) \- This bulletin provides information to replace the front motor reduction gear assembly gear oil on certain 2023\-2024MY Niro EV \(SG2 EV\) vehicles produced from December 12, 2022 through February 7, 2024 and EV6 \(CV\) vehicles produced from December 14, 2022 through February 22, 2024. During the production of the subject vehicles, the amount of gear oil in the front motor and reduction gear assembly may have been filled below factory specification. If the gear oil level is lower than Kia’s factory specifications, the subject vehicles may eventually produce a grinding noise or whining noise from the front of the vehicle while driving.
- [SC345\_QA](/bulletins/11021988.md), 2025-08-20, Service campaign: POWER TRAIN. VOLUNTARY SERVICE CAMPAIGN: QUESTION AND ANSWER \(SC345\) \- This document is the Question and Answer Guide containing the most frequently asked questions regarding the Voluntary Service Campaign SC.
- [SC345\_OWNR\_SG2](/bulletins/11021987.md), 2025-08-20, Service campaign: POWER TRAIN. VOLUNTARY SERVICE CAMPAIGN: OWNER NOTIFICATION \(SC345\) \- This document is the owner notification advising that Kia is conducting a Voluntary Service Campaign to replace the gear oil in the front motor and gear reduction assembly, and fill it to the factory\-specified amount in certain Niro EV vehicles, manufactured from December 12, 2022 through February 7, 2024.
- [SC345\_DPSM](/bulletins/11021985.md), 2025-08-20, Service campaign: POWER TRAIN. VOLUNTARY SERVICE CAMPAIGN: DEALER PARTS AND SERVICE MANAGER MEMO \(SC345\) \- This document is the announcement to the dealer Parts and Service managers advising that Kia is conducting a Voluntary Service Campaign to replace the gear oil in the front motor and gear reduction assembly, and fill it to the factory\-specified amount in certain 2023\-2024MY EV6 vehicles, manufactured from December 14, 2022 through February 22, 2024 and Niro EV vehicles, manufactured from December 12, 2022 through February 7, 2024.
- [SC345\_DP](/bulletins/11021984.md), 2025-08-20, Service campaign: POWER TRAIN. VOLUNTARY SERVICE CAMPAIGN: DEALER PRINCIPAL MEMO \(SC345\) \- This document is the announcement to the dealer principals advising that Kia is conducting a Voluntary Service Campaign to replace the gear oil in the front motor and gear reduction assembly, and fill it to the factory\-specified amount in certain 2023\-2024MY EV6 vehicles, manufactured from December 14, 2022 through February 22, 2024 and Niro EV vehicles, manufactured from December 12, 2022 through February 7, 2024.
- [SC338\_TSB](/bulletins/11019904.md), 2025-07-01, Service bulletin: FUEL/PROPULSION SYSTEM; ELECTRICAL SYSTEM. TECHNICAL SERVICE BULLETIN: VOLUNTARY EMISSIONS SERVICE CAMPAIGN: BMS S/W LOGIC IMPROVEMENT FOR DTC P1BB2 \(SC338\) \- This bulletin provides information to upgrade the Battery Management System ‘BMS’ software logic on certain 2023MY Sportage HEV \(NQ5 HEV\) vehicles produced from February 15, 2022 to October 28, 2023, and 2023\-2024MY Niro HEV \(SG2 HEV\) vehicles produced from June 21, 2022 through February 6, 2023. Due to a software issue, the Battery Management System \(BMS\) may inadvertently overcharge the 12V Lithium battery.
- [SC335\_TSB\_CLSD](/bulletins/11019891.md), 2025-07-01, Service bulletin: ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM. TECHNICAL SERVICE BULLETIN: VOLUNTARY SERVICE CAMPAIGN: BMS S/W LOGIC IMPROVEMENT FOR DTC P1BB2 \(SC335\) CLOSED AND SUPERSEDED TO SC338 \(TSB\) \- This bulletin is now closed. "This bulletin provided information to upgrade the Battery Management System ‘BMS’ software logic on certain 2023\-2024MY Sportage HEV \(NQ5 HEV\) vehicles produced from February 15, 2022 to October 28, 2023, and2023\-2024MY Niro HEV \(SG2 HEV\) vehicles produced from June 21, 2022 through February 6, 2023. Due to a software issue, the Battery Management System \(BMS\) may inadvertently overcharge the 12V Lithium battery.
- [SC338\_STKR](/bulletins/11019732.md), 2025-06-25, Emissions: ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM. SC338\_STKR: VOLUNTARY EMISSIONS SERVICE CAMPAIGN COMPLETION LABEL/STICKER
- [SC338\_QA](/bulletins/11019731.md), 2025-06-25, Emissions: FUEL/PROPULSION SYSTEM; ELECTRICAL SYSTEM. VOLUNTARY EMISSIONS SERVICE CAMPAIGN: QUESTION AND ANSWER \(SC338\) \- This document is the Question and Answer Guide containing the most frequently asked questions regarding the Voluntary Emissions Service Campaign SC338.
- [SC338\_POC](/bulletins/11019729.md), 2025-06-25, Emissions: FUEL/PROPULSION SYSTEM; ELECTRICAL SYSTEM. VOLUNTARY EMISSIONS SERVICE CAMPAIGN: SC338\_POC: PROOF OF CORRECTION CARD
- [SC338\_OWNR\_SG2](/bulletins/11019728.md), 2025-06-25, Emissions: ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM. VOLUNTARY EMISSIONS SERVICE CAMPAIGN: OWNER NOTIFICATION \(SC338\) \- This document is the owner notification advising that Kia is conducting a Voluntary Emissions Service Campaign to update the battery management system \(BMS\) to prevent overcharging of the 12V Lithium battery in certain 2023 MY Niro Hybrid \(HEV\) vehicles to ensure compliance with emissions regulations.
- [SC338\_DPSM](/bulletins/11019722.md), 2025-06-25, Emissions: FUEL/PROPULSION SYSTEM; ELECTRICAL SYSTEM. VOLUNTARY EMISSIONS SERVICE CAMPAIGN: DEALER PARTS AND SERVICE MANAGER MEMO \(SC338\) \- This document is the announcement to the dealer Parts and Service managers advising that Kia is conducting a Voluntary Emissions Service Campaign to update the battery management system \(BMS\) to prevent overcharging of the 12V Lithium battery in certain 2023\-2024 MY Sportage Hybrid \(HEV\) vehicles manufactured from February 15, 2022 through October 28, 2023 and 2023 MY Niro Hybrid \(HEV\) vehicles manufactured from June 21, 2022 through February 6, 2023. These vehicles have not had SA553 completed yet.
- [SC338\_DP](/bulletins/11019721.md), 2025-06-25, Emissions: ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM. VOLUNTARY EMISSIONS SERVICE CAMPAIGN: DEALER PRINCIPAL MEMO \(SC338\) \- This document is the announcement to the dealer principals advising that Kia is conducting a Voluntary Emissions Service Campaign to update the battery management system \(BMS\) to prevent overcharging of the 12V Lithium battery in certain 2023\-2024 MY Sportage Hybrid \(HEV\) vehicles manufactured from February 15, 2022 through October 28, 2023 and 2023 MY Niro Hybrid \(HEV\) vehicles manufactured from June 21, 2022 through February 6, 2023. These vehicles have not had SA553 completed yet.
- [TSB\_TRA046\_R5](/bulletins/11017172.md), 2025-04-23, Service bulletin: POWER TRAIN. TECHNICAL SERVICE BULLETIN: TRANSMISSION FLUID APPLICATION GUIDE \- 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 relating to the correct transmission fluid type and fill quantity requirement for each Kia model. A flush is required ONLY when a transmission is replaced, and the transmission oil cooler is transferred to the new transmission.
- [TSB\_ELE378](/bulletins/11015973.md), 2025-03-26, Service bulletin: ELECTRICAL SYSTEM. TECHNICAL SERVICE BULLETIN: SERVICE ACTION: KIA CONNECT MODEM RESET \(SA611\) \- This bulletin outlines the procedure for resetting the modem in certain 2016\-2025MY Kia vehicles listed on page 3 that are equipped with Kia Connect Services. The affected vehicles may encounter the following issues: remote Start/Climate Control function not working, vehicle Status on the Kia Access App not updating, connected routing not functioning properly.

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