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Service campaign 25-01-060H 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 campaign
NHTSA id11024263
Published by NHTSA2025-10-14
Manufacturer's number25-01-060H TSB
Manufacturer's date2025-10-09
Campaign id or software versionTDFB
NHTSA componentELECTRICAL SYSTEM

NHTSA's summary

Certain Tucson (NX4M) vehicles may exhibit a Data Communication Unit (DCU) software error due to the internal timer initialization logic not being implemented. The DCU module may shut down telematics services after one year. This bulletin provides instructions to perform a software update for the DCU module.

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 TUCSON2025

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

Recalls for the same vehicles and component
26V4000002026-06-23. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
26V0470002026-01-26. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
24V8770002024-11-20. 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-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-EE-007H TSB2026-06-23. Service bulletin. Some Palisade (LX2), Tucson (NX4), and Tucson Hybrid (NX4 HEV) vehicles may experience battery drain due to continuous operation of the cooling fan after vehicle ignition has been turned off, potentially resulting in a no-start condition. The continuous cooling fan operation is caused by a stuck relay in the engine room PCB block. This bulletin provides instructions to replace the engine room PCB block to ensure the proper operation of the cooling fan.
26-GI-002H TSB2026-06-06. Service bulletin. 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.
26-01-041H TSB2026-05-12. Warranty extension. Certain Tucson (NX4A) vehicles may experience Over-the-Air (OTA) update failures due to outdated Central Communication Unit (CCU) software. This bulletin provides instructions to perform a software update for the CCU.
26-01-035H TSB2026-04-15. Service campaign. Some vehicles may exhibit a loss of connectivity or interruptions in the middle of using Bluelink functions. This may be due to an occasional disconnection on Verizon’s communication network. Follow the procedures in this bulletin to verify Bluelink Data Communication Unit (DCU) network connection and if needed, reset the DCU in Dealer Mode to resolve the connection.
26-EM-009H TSB2026-03-30. Service bulletin. Some Sonata (DN8) and Tucson (NX4/NX4A/NX4M) vehicles equipped with the 2.5L Theta III GDI engine may display a warning lamp and store Diagnostic Trouble Code (DTC) P2B59F0, which relates to the Integrated Thermal Management Module (ITM) circuit due to a logic error. This bulletin provides instructions to update the Engine Control Module (ECM) logic to correct this condition.
25-01-061H-1 DCS2025-12-02. Service campaign. not being implemented. The DCU module may shut down telematics services after one year. TSB 25-01-061H-1 provides instructions to perform a software update for the DCU module.
25-01-061H-1 TSB2025-12-02. Service campaign. Certain Tucson (NX4A) vehicles may exhibit a Data Communication Unit (DCU) software error due to the internal timer initialization logic not being implemented. The DCU module may shut down telematics services after one year. This bulletin provides instructions to perform a software update for the DCU module.
TDF-TDFA-TDFB DCS2025-11-18. Service campaign. Certain Tucson Hybrid (NX4 HEV), Tucson Plug-in Hybrid (NX4 PHEV), Tucson (NX4), and Tucson (NX4M) vehicles may exhibit a Data Communication Unit (DCU) software error due to the internal timer initialization logic not being implemented. The DCU module may shut down telematics services after one year. Technical Service Bulletins (TSBs) 25-01-057H-1, 25-01-059H-1 & 25-01-060H-1 provide instructions to perform a software update for the DCU module. Over-the-Air (OTA): This update can also be conducted via OTA. The customer can complete on his/her own if he/she has an active subscription to Hyundai Bluelink. A visit to the dealership is not required.
25-01-060H-1 TSB2025-11-18. Service campaign. Certain Tucson (NX4M) vehicles may exhibit a Data Communication Unit (DCU) software error due to the internal timer initialization logic not being implemented. The DCU module may shut down telematics services after one year. This bulletin provides instructions to perform a software update for the DCU module.