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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 on file from NHTSA, as of 2026-10-19.

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Only bulletins with type: Emissions are shown. Show all

Bulletins, newest first
SC338_OWNR_SG2_1022025-09-11. 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_R12025-09-03. 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).
SC338_STKR2025-06-25. Emissions. ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM. SC338_STKR: VOLUNTARY EMISSIONS SERVICE CAMPAIGN COMPLETION LABEL/STICKER
SC338_QA2025-06-25. 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_POC2025-06-25. Emissions. FUEL/PROPULSION SYSTEM; ELECTRICAL SYSTEM. VOLUNTARY EMISSIONS SERVICE CAMPAIGN: SC338_POC: PROOF OF CORRECTION CARD
SC338_OWNR_SG22025-06-25. 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_DPSM2025-06-25. 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_DP2025-06-25. 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.
SC325_STKR2025-02-05. Emissions. ENGINE; ELECTRICAL SYSTEM. VOLUNTARY EMISSIONS SERVICE CAMPAIGN: SC325_STKR: COMPLETION LABEL/STICKER
SC325_QA2025-02-05. Emissions. ELECTRICAL SYSTEM; ENGINE. VOLUNTARY EMISSIONS SERVICE CAMPAIGN: QUESTION AND ANSWER (SC325) - This document is the Question and Answer Guide containing the most frequently asked questions regarding the Voluntary Emissions Service Campaign SC325.
SC325_POC2025-02-05. Emissions. ENGINE; ELECTRICAL SYSTEM. VOLUNTARY EMISSIONS SERVICE CAMPAIGN: SC325_POC: PROOF OF CORRECTION CARD
SC325_OWNR_SG22025-02-05. Emissions. ELECTRICAL SYSTEM; ENGINE. VOLUNTARY EMISSIONS SERVICE CAMPAIGN: OWNER NOTIFICATION (SC325) - This document is the owner notification advising that Kia conducting Voluntary Emissions Service Campaign regarding the Auxiliary Electric Water Pump (AEWP) on certain 2023 MY Niro P/HEV vehicles. Kia has become aware that the Auxiliary Electric Water Pump (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. 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 drive power and may cause the vehicle to release air pollutants which exceed Federal and California standards. These standards were established to protect the public health and welfare from the dangers of air pollution.
SC325_DPSM2025-02-05. Emissions. ELECTRICAL SYSTEM; ENGINE. VOLUNTARY EMISSIONS SERVICE CAMPAIGN: DEALER PARTS AND SERVICE MANAGER MEMO (SC325) - This document is the announcement to the dealer Parts and Service managers advising that Kia is conducting a Voluntary Emissions Service Campaign regarding the Auxiliary Electric Water Pump (AEWP) on certain 2023 MY Niro P/HEV, 2023 MY Sportage P/HEV, and 2022-2023 MY Sorento P/HEV vehicles. Kia has become aware that the Auxiliary Electric Water Pump (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. 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 drive power and may cause the vehicle to release air pollutants which exceed Federal and California standards. These standards were established to protect the public health and welfare from the dangers of air pollution.
SC325_DP2025-02-05. Emissions. ELECTRICAL SYSTEM; ENGINE. VOLUNTARY EMISSIONS SERVICE CAMPAIGN: DEALER PRINCIPAL MEMO (SC325) - This document is the announcement to the dealer principals advising that Kia is conducting a Voluntary Emissions Service Campaign regarding the Auxiliary Electric Water Pump (AEWP) on certain 2023 MY Niro P/HEV, 2023 MY Sportage P/HEV, and 2022-2023 MY Sorento P/HEV vehicles. Kia has become aware that the Auxiliary Electric Water Pump (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. 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 drive power and may cause the vehicle to release air pollutants which exceed Federal and California standards. These standards were established to protect the public health and welfare from the dangers of air pollution.
SC305_STKR2024-08-09. Emissions. ENGINE. SC305_STKR: VOLUNTARY EMISSIONS SERVICE CAMPAIGN COMPLETION LABEL/STICKER
SC305_POC2024-08-09. Emissions. ENGINE. SC305_POC: PROOF OF CORRECTION CARD
SC305_OWNR2024-08-09. Emissions. ENGINE. VOLUNTARY EMISSIONS SERVICE CAMPAIGN: OWNER NOTIFICATION (SC305) - This document is the owner notification advising that Kia is conducting a Voluntary Emissions Service Campaign on certain 2023 MY Niro Hybrid (HEV) vehicles manufactured from June 21, 2022 through March 20, 2023 and certain 2023 Niro Plug-in Hybrid (PHEV) vehicles manufactured from July 11, 2022 through March 17, 2023 to replace the EGR control valve pipe and hose with a new one.
SC305_QA2024-08-09. Emissions. ENGINE. VOLUNTARY EMISSIONS SERVICE CAMPAIGN: QUESTIONS AND ANSWER (SC305) - This document is the Question and Answer Guide containing the most frequently asked questions regarding the Voluntary Emissions Service Campaign SC305.
SC305_DPSM2024-08-09. Emissions. ENGINE. VOLUNTARY EMISSIONS SERVICE CAMPAIGN: DEALER PARTS AND SERVICE MANAGER MEMO (SC305) - This document is the announcement to the dealer Parts and Service Managers advising that Kia is conducting a Voluntary Emissions Service Campaign on certain 2023 MY Niro Hybrid (HEV) vehicles manufactured from June 21, 2022 through March 20, 2023 and certain 2023 Niro Plug-in Hybrid (PHEV) vehicles manufactured from July 11, 2022 through March 17, 2023 to replace the EGR control valve pipe and hose with a new one.
SC305_DP2024-08-09. Emissions. ENGINE. VOLUNTARY EMISSIONS SERVICE CAMPAIGN: DEALER PRINCIPAL MEMO (SC305) - This document is the announcement to the dealer principals advising that Kia is conducting a Voluntary Emissions Service Campaign on certain 2023 MY Niro Hybrid (HEV) vehicles manufactured from June 21, 2022 through March 20, 2023 and certain 2023 Niro Plug-in Hybrid (PHEV) vehicles manufactured from July 11, 2022 through March 17, 2023 to replace the EGR control valve pipe and hose with a new one.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.