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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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id11033710
Published by NHTSA2026-06-06
Manufacturer's number26-GI-002H TSB
Manufacturer's date2026-05-27
NHTSA componentELECTRICAL 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

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system

Vehicles listed
HYUNDAI ELANTRA2023
HYUNDAI ELANTRA HYBRID2023, 2024, 2025 (the catalog's model; the bulletin names a series or trim of it)
HYUNDAI ELANTRA N2023, 2024, 2025
HYUNDAI IONIQ 52022, 2023, 2024, 2025
HYUNDAI IONIQ 5 N2025, 2026
HYUNDAI IONIQ 62023, 2024, 2025
HYUNDAI KONA2023, 2024, 2025
HYUNDAI KONA ELECTRIC2023, 2024, 2025 (the catalog's model; the bulletin names a series or trim of it)
HYUNDAI KONA N2023
HYUNDAI PALISADE2023, 2024, 2025
HYUNDAI SANTA CRUZ2023, 2024, 2025
HYUNDAI SANTA FE2023, 2024, 2025
HYUNDAI SANTA FE HYBRID2023, 2024, 2025 (the catalog's model; the bulletin names a series or trim of it)
HYUNDAI SANTA FE PLUG-IN HYBRID2023 (the catalog's model; the bulletin names a series or trim of it)
HYUNDAI SONATA2023, 2024, 2025
HYUNDAI SONATA HYBRID2023, 2024, 2025 (the catalog's model; the bulletin names a series or trim of it)
HYUNDAI TUCSON2023, 2024, 2025, 2026
HYUNDAI TUCSON HYBRID2023, 2024, 2025, 2026 (the catalog's model; the bulletin names a series or trim of it)
HYUNDAI TUCSON PLUG-IN HYBRID2023, 2024, 2025, 2026 (the catalog's model; the bulletin names a series or trim of it)

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
26V4320002026-07-02. ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
26V4000002026-06-23. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
26V3080002026-05-14. ELECTRICAL SYSTEM:PROPULSION SYSTEM:HYBRID MANAGEMENT:POWER CONTROL UNIT/MODULE (HPCU)
26V0680002026-02-05. ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
26V0470002026-01-26. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
20255292025-10-02. Electrical
25V6590002025-10-02. ELECTRICAL SYSTEM:STARTER ASSEMBLY
25V6060002025-09-11. ELECTRICAL SYSTEM:PROPULSION SYSTEM:CHARGING:PORT
25V4820002025-07-23. ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
25V0640002025-02-06. AIR BAGS:SIDE/WINDOW; ELECTRICAL SYSTEM:WIRING

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
26-01-082H TSB2026-10-14. Warranty extension. 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 DCS2026-10-14. Warranty extension. 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 DCS2026-10-06. Warranty extension. 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 TSB2026-10-06. Warranty extension. 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 OL2026-09-11. Service campaign. 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 TSB2026-09-09. Service bulletin. 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 DCS2026-09-02. Service campaign. 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 DN2026-09-02. Service campaign. 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 TSB2026-09-02. Service bulletin. 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 TSB2026-08-21. Service campaign. 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.