# Service bulletin 26\-GI\-002H TSB

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: 11033710
- Published by NHTSA: 2026\-06\-06
- Manufacturer's number: 26\-GI\-002H TSB
- Manufacturer's date: 2026\-05\-27
- NHTSA component: ELECTRICAL SYSTEM

## NHTSA's summary

This bulletin provides information related to the navigation and head unit software changes introduced in the 2026 1st Navigation Map and Software Update. The changes may vary depending on vehicle type, model, and navigation system. Refer to the 2026 1st Navigation Map and Software Update Key Improvements and Additional Improvements tables in this TSB for a list of specific changes. The software can be downloaded via Navigation Updater \(NAU\) and updated by USB.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11033710-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11033710-9999.pdf)

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

## Components

Electrical system

## Vehicles listed

- 2023 HYUNDAI ELANTRA
- 2023 to 2025 HYUNDAI ELANTRA HYBRID
- 2023 to 2025 HYUNDAI ELANTRA N
- 2022 to 2025 HYUNDAI IONIQ 5
- 2025 to 2026 HYUNDAI IONIQ 5 N
- 2023 to 2025 HYUNDAI IONIQ 6
- 2023 to 2025 HYUNDAI KONA
- 2023 to 2025 HYUNDAI KONA ELECTRIC
- 2023 HYUNDAI KONA N
- 2023 to 2025 HYUNDAI PALISADE
- 2023 to 2025 HYUNDAI SANTA CRUZ
- 2023 to 2025 HYUNDAI SANTA FE
- 2023 to 2025 HYUNDAI SANTA FE HYBRID
- 2023 HYUNDAI SANTA FE PLUG\-IN HYBRID
- 2023 to 2025 HYUNDAI SONATA
- 2023 to 2025 HYUNDAI SONATA HYBRID
- 2023 to 2026 HYUNDAI TUCSON
- 2023 to 2026 HYUNDAI TUCSON HYBRID
- 2023 to 2026 HYUNDAI TUCSON PLUG\-IN HYBRID

## Recalls for the same vehicles and component

- [26V432000](/recalls/nhtsa/26V432000.md), 2026-07-02: ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
- [26V400000](/recalls/nhtsa/26V400000.md), 2026-06-23: ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
- [26V308000](/recalls/nhtsa/26V308000.md), 2026-05-14: ELECTRICAL SYSTEM:PROPULSION SYSTEM:HYBRID MANAGEMENT:POWER CONTROL UNIT/MODULE \(HPCU\)
- [26V068000](/recalls/nhtsa/26V068000.md), 2026-02-05: ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
- [26V047000](/recalls/nhtsa/26V047000.md), 2026-01-26: ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
- [2025529](/recalls/tc/2025529.md), 2025-10-02: Electrical
- [25V659000](/recalls/nhtsa/25V659000.md), 2025-10-02: ELECTRICAL SYSTEM:STARTER ASSEMBLY
- [25V606000](/recalls/nhtsa/25V606000.md), 2025-09-11: ELECTRICAL SYSTEM:PROPULSION SYSTEM:CHARGING:PORT
- [25V482000](/recalls/nhtsa/25V482000.md), 2025-07-23: ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
- [25V064000](/recalls/nhtsa/25V064000.md), 2025-02-06: AIR BAGS:SIDE/WINDOW; ELECTRICAL SYSTEM:WIRING

## Other bulletins for the same vehicles and component

- [26\-01\-082H TSB](/bulletins/11038467.md), 2026-10-14, Warranty extension: ELECTRICAL SYSTEM. Certain IONIQ 5 \(NEA EV\) vehicles may experience Malfunction Indicator Lamp \(MIL\) illumination and false battery overtemperature fault diagnosis caused by water ingress into the high voltage battery system. This condition may cause unnecessary fail\-safe activation, potentially resulting in reduced vehicle performance or limited vehicle operation if the vehicle is continually driven. This bulletin provides the service procedure to update the Battery Management System \(BMS\) software to optimize the fail\-safe activation logic to prevent false activation. Additionally, diagnostic criteria for DTC P1AD300 “Hybrid/EV Battery Abnormal Performance: MISD” has also been improved to enhance diagnostic accuracy.
- [26\-01\-082H DCS](/bulletins/11038466.md), 2026-10-14, Warranty extension: ELECTRICAL SYSTEM. Certain IONIQ 5 \(NEA EV\) vehicles may experience Malfunction Indicator Lamp \(MIL\) illumination and false battery overtemperature fault diagnosis caused by water ingress into the high\-voltage battery system. This condition may cause unnecessary fail\-safe activation, potentially resulting in reduced vehicle performance or limited vehicle operation if the vehicle is continually driven.
- [26\-BE\-001H\-2 DCS](/bulletins/11038179.md), 2026-10-06, Warranty extension: ELECTRICAL SYSTEM. Some vehicles may have an inoperable horn that may be caused by foreign substances causing internal parts to oxidize. Hyundai is extending the warranty coverage for the horn replacement under this condition to 10 years or 120,000 miles from the date of original retail delivery or date of first use \(whichever occurs first\) and is valid for original and subsequent owners. If a horn needs to be replaced, follow the instructions within this Technical Service Bulletin \(TSB\)26\-BE\-001H\-2 to install the latest design. Please note that any vehicles under 10 years/120,000 miles are covered by this TSB, even if vehicle is with original warranty of 5 years/60,000 miles.
- [26\-BE\-001H\-2 TSB](/bulletins/11038173.md), 2026-10-06, Warranty extension: ELECTRICAL SYSTEM. Some vehicles may have an inoperable horn that may be caused by foreign substances causing internal parts to oxidize. Hyundai is extending the warranty coverage for the horn replacement under this condition to 10 years or 120,000 miles from the date of original retail delivery or date of first use \(whichever occurs first\) and is valid for original and subsequent owners. If a horn needs to be replaced, follow the instructions within this TSB to install the latest design. Please note that any vehicles under 10 years / 120,000 miles are covered by this TSB, even if vehicle is within original warranty of 5 years / 60,000 miles.
- [9C5 OL](/bulletins/11037293.md), 2026-09-11, Service campaign: ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM. Hyundai has determined that certain Kona Electric and Ioniq Electric vehicles are eligible for a BMS software update. This update to the BMS software improves the system’s diagnostic capability.
- [26\-BE\-025H TSB](/bulletins/11037232.md), 2026-09-09, Service bulletin: ELECTRICAL SYSTEM. Some Tucson \(NX4, NX4A, NX4M\), Tucson Hybrid \(NX4 HEV\), and Tucson Plug\-In Hybrid \(NX4 PHEV\) vehicles may exhibit a 12\-volt battery drain due to the passive entry feature of the Digital Key 2 premium causing repeated wakeup of the vehicle. This bulletin provides instructions to perform software updates for the Ultra\-Wide Band \(UWB\) and Body Domain Control \(BDC\) modules.
- [26\-01\-065H DCS](/bulletins/11036686.md), 2026-09-02, Service campaign: FUEL/PROPULSION SYSTEM; ELECTRICAL SYSTEM. Certain Kona Electric \(OS EV\) and Ioniq Electric \(AE EV\) vehicles are eligible for a Battery Management System \(BMS\) software update. This update to the BMS software improves the system's diagnostic capability. Follow Technical Service Bulletin \(TSB\) 26\-01\-065H to complete the BMS software update.
- [26\-01\-065H DN](/bulletins/11036685.md), 2026-09-02, Service campaign: FUEL/PROPULSION SYSTEM; ELECTRICAL SYSTEM. Certain Kona Electric \(OS EV\) and Ioniq Electric \(AE EV\) vehicles are eligible for a Battery Management System \(BMS\) software update. This update to the BMS software improves the system’s diagnostic capability.
- [26\-BE\-026H TSB](/bulletins/11036624.md), 2026-09-02, Service bulletin: ELECTRICAL SYSTEM. Some Santa Fe \(MX5A\) and Santa Fe Hybrid \(MX5A HEV\) vehicles may exhibit a 12\-volt battery drain due to the passive entry feature of the Digital Key 2 premium causing repeated wakeup of the vehicle. This bulletin provides instructions to perform software updates for the Ultra\-Wide Band \(UWB\) and Body Domain Control \(BDC\) modules.
- [26\-01\-065H TSB](/bulletins/11036311.md), 2026-08-21, Service campaign: ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM. Certain Kona Electric \(OS EV\) and Ioniq Electric \(AE EV\) vehicles are eligible for a Battery Management System \(BMS\) software update. This update to the BMS software improves the system’s diagnostic capability. Follow this bulletin to complete the BMS software update.

JSON: [/v1/bulletins/11033710](/v1/bulletins/11033710)

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