# Service bulletin 26\-GI\-002G 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: 11033711
- Published by NHTSA: 2026\-06\-06
- Manufacturer's number: 26\-GI\-002G 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-11033711-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11033711-9999.pdf)

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

## Components

Electrical system

## Vehicles listed

- 2022 to 2025 GENESIS G70
- 2021 to 2025 GENESIS G80
- 2023 to 2026 GENESIS G80 ELECTRIFIED
- 2023 to 2026 GENESIS G90
- 2023 to 2025 GENESIS GV60
- 2022 to 2026 GENESIS GV70
- 2023 to 2026 GENESIS GV70 ELECTRIFIED
- 2021 to 2025 GENESIS GV80

## Recalls for the same vehicles and component

- [26V019000](/recalls/nhtsa/26V019000.md), 2026-01-16: ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
- [25V833000](/recalls/nhtsa/25V833000.md), 2025-12-01: ELECTRICAL SYSTEM:ADAS; FORWARD COLLISION AVOIDANCE: SENSING SYSTEM: RADAR
- [25V474000](/recalls/nhtsa/25V474000.md), 2025-07-17: ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
- [25V105000](/recalls/nhtsa/25V105000.md), 2025-02-19: ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
- [24V868000](/recalls/nhtsa/24V868000.md), 2024-11-18: ELECTRICAL SYSTEM:PROPULSION SYSTEM:CHARGING:MODULE:SOFTWARE; ELECTRICAL SYSTEM:12V/24V/48V BATTERY
- [24V205000](/recalls/nhtsa/24V205000.md), 2024-03-15: ELECTRICAL SYSTEM:WIRING
- [24V204000](/recalls/nhtsa/24V204000.md), 2024-03-15: ELECTRICAL SYSTEM:PROPULSION SYSTEM:CHARGING:MODULE:SOFTWARE; ELECTRICAL SYSTEM:12V/24V/48V BATTERY

## Other bulletins for the same vehicles and component

- [26\-01\-083G TSB](/bulletins/11038475.md), 2026-10-15, Warranty extension: ELECTRICAL SYSTEM. Certain G70 \(IK\) vehicles equipped with an AVN5W head unit may exhibit the map, navigation, and voice recognition systems not loading after an Over the Air \(OTA\) software update due to an error in the software update logic. This bulletin provides instructions to use a provided USB stick to perform a manual software update to correct this condition.
- [26\-01\-077G TSB](/bulletins/11038425.md), 2026-10-09, Warranty extension: ELECTRICAL SYSTEM; SERVICE BRAKES. Certain GV70 Electrified \(JK1A EV\) and G80 Electrified \(RG3 EV\) vehicles may display a false warning light with Diagnostic Trouble Codes \(DTC\) U151A8C and/or U151B8C when vehicle is placed into “Ready” mode. This bulletin provides the procedure for updating the Vehicle Control Unit \(VCU\) software to address this condition.
- [26\-01\-072G TSB](/bulletins/11037285.md), 2026-09-11, Service campaign: ELECTRICAL SYSTEM. Certain GV60 \(JW1 EV\) and G90 \(RS4\) vehicles may exhibit an inability to perform Over the Air \(OTA\) software updates due to an internal logic error that prevents the updates from being completed properly. This bulletin provides instructions to perform a Data Connectivity Unit \(DCU\) software update to correct this condition.
- [26\-01\-072G DCS](/bulletins/11037284.md), 2026-09-11, Service campaign: ELECTRICAL SYSTEM. Certain GV60 \(JW1 EV\) and G90 \(RS4\) vehicles may exhibit an inability to perform Over the Air \(OTA\)software updates due to an internal logic error that prevents the updates from being completed properly.
- [26\-01\-017G\-1 TSB](/bulletins/11036099.md), 2026-08-11, Warranty extension: ELECTRICAL SYSTEM. Certain GV70 \(JK1A\) vehicles may exhibit a Data Connectivity 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.
- [26\-01\-018G\-1 TSB](/bulletins/11036097.md), 2026-08-11, Warranty extension: ELECTRICAL SYSTEM. Certain GV70 Electrified \(JK1A EV\) vehicles may exhibit a Data Connectivity 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.
- [L03A L04G DCS](/bulletins/11036096.md), 2026-08-11, Warranty extension: ELECTRICAL SYSTEM. Certain 2026MY GV70 \(JK1A\) and 2026MY GV70 Electrified \(JK1A\) 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 \(TSBs\) 26\-01\-017G\-1 26\-01\-018G\-1 provide instructions to perform a software update for the DCU module. Over\-the\-Air \(OTA\): This update can also be conducted via OTA. Guests cancomplete on their own if they have an active subscription to Genesis Connected Services. A visit to retailers is not required if the update is conducted via OTA.
- [26\-EV\-004G DCS](/bulletins/11034031.md), 2026-06-23, Warranty extension: ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM. Genesis is extending the warranty coverage for the Integrated Charging Control Unit \(ICCU\) and ICCU fuse to 15 years/180,000 miles from the date of original retail delivery or date of first use \(whichever occurs first\) and is valid for original and subsequent owners. Follow the flowchart in Technical Service Bulletin \(TSB\) 26\-EV\-004G to check for an active or stored occurrence of any Diagnostic Trouble Code \(DTC\) that requires replacement of the ICCU and replace the ICCU and ICCU fuse if necessary. Some vehicles may have an active DTC that requires ICCU replacement. Please note that any vehicles under 15 years/180,000 miles are covered by this TSB, even if vehicle is within High Voltage Warranty of 10 years/120,000 miles.
- [26\-EV\-004G DN](/bulletins/11034030.md), 2026-06-23, Warranty extension: ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM. Genesis is extending the warranty coverage for the Integrated Charging Control Unit \(ICCU\) and ICCU fuse to 15 years/180,000 miles from the date of original retail delivery or date of first use \(whichever occurs first\) and is valid for original and subsequent owners.
- [26\-EV\-004G TSB](/bulletins/11034029.md), 2026-06-23, Warranty extension: ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM. Genesis is extending the warranty coverage for the Integrated Charging Control Unit \(ICCU\) and ICCU fuse to 15 years / 180,000 miles from the date of original retail delivery or date of first use \(whichever occurs first\) and is valid for original and subsequent owners. Follow the flowchart in this bulletin to check for an active or stored occurrence of any Diagnostic Trouble Code \(DTC\) that requires replacement of the ICCU and replace the ICCU and ICCU fuse if necessary. Some vehicles may have an active DTC that requires ICCU replacement.

JSON: [/v1/bulletins/11033711](/v1/bulletins/11033711)

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