# Service bulletin 20\-01\-035H

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: 10181006
- Published by NHTSA: 2020\-10\-08
- Manufacturer's number: 20\-01\-035H
- Manufacturer's date: 2020\-09\-16
- NHTSA component: ELECTRICAL SYSTEM

## NHTSA's summary

This bulletin describes the procedure to replace the fuse cover that may be out of specification.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10181006-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10181006-9999.pdf)

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

## Components

Electrical system

## Vehicles listed

- 2020 HYUNDAI IONIQ HYBRID
- 2020 HYUNDAI IONIQ PLUG\-IN HYBRID

## Recalls for the same vehicles and component

- [21V127000](/recalls/nhtsa/21V127000.md), 2021-03-01: ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY

## Other bulletins for the same vehicles and component

- [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\-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\-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.
- [25\-BE\-020H TSB](/bulletins/11023692.md), 2025-10-03, Service bulletin: ELECTRICAL SYSTEM. This bulletin provides information related to the changes introduced in the 2025 1st Navigation Map and Software Update. The changes may vary depending on vehicle type, model, and navigation system as described in this TSB.
- [25\-BE\-002H TSB](/bulletins/11018876.md), 2025-06-03, Service bulletin: ELECTRICAL SYSTEM. This bulletin provides information related to the changes introduced in the 2024 2nd Navigation Map and Software Update. The changes may vary depending on vehicle type, model, and navigation system. Refer to the 2024 2nd Navigation Map and Software Update Improvements section in this TSB for a list of specific changes. The software can be downloaded via Navigation Updater \(NAU\) and updated by USB. The NAU website is https://update.hyundai.com/US/EN/navigationUpdate. For certain models equipped with a relevant Bluelink package, the software may be downloaded and applied via OTA update.
- [25\-01\-024H\-1 TSB](/bulletins/11018575.md), 2025-05-27, Service campaign: ELECTRICAL SYSTEM. Some vehicles may exhibit a loss of connectivity or interruptions in the middle of using Bluelink Service functions. This may be due to an irregular disconnection on Verizon’s communication network. Follow the procedure in this TSB to reestablish the connection via the AVN pinhole reset method.
- [25\-01\-024H EM](/bulletins/11017111.md), 2025-04-18, Service campaign: ELECTRICAL SYSTEM. Some vehicles may exhibit a loss of connectivity or interruptions in the middle of using Bluelink Service functions. This may be due to an irregular disconnection on Verizon's communication network. If you are experiencing issues with remote commands, or other Bluelink services, please see the instructions below to reestablish the connection via the AVN pinhole reset method.
- [25\-01\-024H TSB](/bulletins/11015936.md), 2025-03-25, Service campaign: ELECTRICAL SYSTEM. Some vehicles may exhibit a loss of connectivity or interruptions in the middle of using Bluelink Service functions. This may be due to an irregular disconnection on Verizon’s communication network. Follow the procedure in this TSB to reestablish the connection via the AVN pinhole reset method.
- [24\-01\-034H](/bulletins/10254336.md), 2024-05-06, Service bulletin: ELECTRICAL SYSTEM. This bulletin provides the procedure to update the BMS \(Battery Management System\), MCU \(Motor Control Unit\), VCULDC \(Vehicle Control Unit / Low DC\-DC Converter\) and IGPM \(Integrated Gateway Power Module\) to enhance the battery diagnostics logic for 2020\-21MY IONIQ Electric \(AE EV\) vehicles.

JSON: [/v1/bulletins/10181006](/v1/bulletins/10181006)

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