Hyundai bulletin 24-01-034H
What it saysThis 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… NHTSA’s full summary ↓
Hyundai filed this with NHTSA as a service bulletin dated Apr 30, 2024, received May 6, 2024, about the electrical system. It names 1 model year (2020). A service bulletin is not a safety recall: it is the manufacturer telling its dealers how to diagnose or repair a condition, and whether the work is paid for depends on the warranty in force. Quoting the number at a service desk can save a diagnosis.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationWhat it applies to, as the document itself states it — the build window in the manufacturer’s own words, read by machine from the PDF NHTSA serves. The build date is on the certification label in the driver’s door jamb; the dealer settles a borderline vehicle by its VIN.
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.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 24-01-034H | Service bulletin | Apr 30, 2024 | 10254336 | PDF, 364 KB |
What the document itself lists
The manufacturer titles it “HIGH VOLTAGE BATTERY SOFTWARE UPDATES – IMPROVED LOGIC APPLICATION”.
Parts the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| 36601-0E155 | EAEEONM-NS0-D000 | — | eBay Motors → |
| 91950-G7532 | — | — |
Read by machine from the document NHTSA serves (6 pages), read Sep 30, 2026. A part number is shown only where it matches Hyundai’s own catalogue shape, an operation only with its code and time, and a description only where the reader got it whole; anything it could not settle is left out, and the PDF is the record. Times are the manufacturer’s warranty allowances, not a quote. Listings and prices on eBay Motors are the seller’s.
Affiliate disclosure: some links on this page are affiliate links. If you request a quote or buy through them we may earn a commission at no extra cost to you. Nothing on this page changes because of it.
The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5. One communication is usually filed as several documents — the bulletin, a dealer notice, an owner letter — and the number on any of them finds this page. A PDF link is shown only once NHTSA’s own server has been seen to serve that document; the rest are checked over the following nights. Quote the number at a service desk; it is what the dealer’s system is keyed on.
Model years it names
Source: as the manufacturer filed themA vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
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What owners reported
Source: NHTSA complaint databaseOwners of the 1 model year this bulletin names have filed 31 complaints with NHTSA since 2015. 8 of them name Electrical System — the same broad component group this bulletin is filed under. NHTSA groups complaints coarsely, so that means the same area of the vehicle, not necessarily the same fault.
The charge controller failed twice and one of the times I was out on a dangerous road where there wasn’t a safe spot to pull over. It was very sketchy
2020 Hyundai Ioniq · Electrical System · filed with NHTSA Mar 31, 2026 · ODI 11728257
A complaint is one owner’s account, not a defect finding, and a bulletin is not a recall. Nothing here says this bulletin was issued because of these complaints, or that the repair it describes fixed them. Complaint files on this site begin in 2015.
More bulletins about the electrical system
Source: same model, same component group9 other manufacturer communications filed against the Hyundai Ioniq under the same component group (electrical system), newest first. The eight newest are listed; the rest are on the Hyundai list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| 26-GI-003H | Service bulletin | Oct 27, 2026 | This bulletin provides information related to the navigation and head unit software changes introduced in the 2026 2nd Navigation Map and So… |
| 9C5 | Service campaign | Sep 9, 2026 | Certain Kona Electric (OS EV) and Ioniq Electric (AE EV) vehicles are eligible for a Battery Management System (BMS) software update. This u… |
| 25-BE-020H | Service bulletin | Sep 30, 2025 | This bulletin provides information related to the changes introduced in the 2025 1st Navigation Map and Software Update. The changes may var… |
| TBW | Service campaign | Jul 9, 2025 | A software update is available for multiple vehicles equipped with either Display Audio 2.0V or the AVN 5th Gen Wide system. |
| 25-BE-002H | Service bulletin | May 16, 2025 | This bulletin provides information related to the changes introduced in the 2024 2nd Navigation Map and Software Update. The changes may var… |
| 9C1 | Service campaign | May 8, 2025 | Some vehicles may exhibit a loss of connectivity or interruptions in the middle of using Bluelink Service functions. This may be due to an i… |
| SERVICE CAMPAIGN TBW | Service campaign | Sep 12, 2024 | A software update is available for multiple vehicles equipped with either Display Audio 2.0V or the AVN 5th Gen Wide system. |
| 24-EV-001H | Service bulletin | Mar 12, 2024 | This bulletin provides the procedure to update the ECU software on certain 2021-2022MY IONIQ Plug-in Hybrid (AE PHEV) vehicles that may exhi… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Hyundai, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Hyundai 24-01-034H a recall?
No. A service bulletin is a manufacturer communication filed with NHTSA under 49 CFR 579.5; a safety recall carries an NHTSA campaign number (two digits, a letter, six digits) and a federal duty to repair for free. Check the vehicle’s recalls by VIN at nhtsa.gov/recalls, or on its page here.
Is the 24-01-034H repair free?
Not automatically. A service bulletin describes how to diagnose or repair a condition; who pays depends on the warranty in force, any extension, and the dealer. Quoting the number can save a diagnosis either way. Every Hyundai warranty extension on file lists the ones Hyundai has filed.
Which vehicles does 24-01-034H cover?
The manufacturer filed it against 1 model year: 2020 Hyundai Ioniq. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone. The document itself sets the build window: built 17 Oct 2019 – 17 May 2021 — the build date is on the certification label in the driver’s door jamb.