Hyundai service campaign TDW
What it saysCertain 2025MY IONIQ 5 (NEA EV) vehicles are equipped with a Motor and Reduction Gear Motor-Gear Drive Unit (MGDU) differential gear assemblies that are missing a wave washer. NHTSA’s full summary ↓
Hyundai filed this with NHTSA as a service campaign dated Aug 29, 2025, received Sep 3, 2025, about the power train — 1 document under this number: 25-01-056H TSB. It names 1 model year (2025). A service campaign is not a safety recall — there is no NHTSA campaign number and no federal requirement — but it is usually work the manufacturer pays for on the vehicles it names; the dealer checks the VIN against the manufacturer’s list.
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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.
Certain 2025MY IONIQ 5 (NEA EV) vehicles are equipped with a Motor and Reduction Gear Motor-Gear Drive Unit (MGDU) differential gear assemblies that are missing a wave washer. This can cause the MGDU housing to make noise. Follow the procedure outlined in this TSB to replace the Front or Rear Motor & Reduction Gear assembly.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 25-01-056H TSB | Service campaign | Aug 29, 2025 | 11022374 | PDF, 372 KB |
What the document itself lists
The manufacturer titles it “FRONT OR REAR MOTOR-GEAR DRIVE UNIT (MGDU)”.
Parts the bulletin names
| Part number | Description | Qty |
|---|---|---|
| 44000-18FA1 | — | — |
| 49557-F2000 | — | — |
| 49551-4T000 | — | — |
| 44000-18FB2 | — | — |
| 11406-10406K | — | — |
| 14630-02910 | — | — |
| 00232-19098 | Coolant | — |
Labour operations and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| 50DV10R0 | Replacement of FRONT Motor Gear Drive Unit | 4.8 hrs |
| 50DV10R1 | Replacement of REAR Motor Gear Drive Unit | 4.2 hrs |
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.
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 318 complaints with NHTSA since 2015. 59 of them name Power Train — 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.
ICCU failure and fuse, the car became unoperational and needed to stop. The car would no longer charge the 12V battery, and the EV battery would not charge. Hybrid Control Problem Detected at 3,160 miles. DTC P056216
2025 Hyundai Ioniq 5 · Power Train · filed with NHTSA Jan 28, 2026 · ODI 11713949
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 power train
Source: same model, same component group5 other manufacturer communications filed against the Hyundai Ioniq 5 under the same component group (power train), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| LA9 | Warranty extension | Mar 17, 2026 | Certain IONIQ 5 (NEA EV) and IONIQ 9 (ME1A EV) vehicles (affected VINs listed below) may exhibit a high-frequency noise from the front motor… |
| TDR | Service campaign | Jul 8, 2025 | Certain 2024MY Kona Electric (SX2 EV) and 2023-2024MY IONIQ 5 (NE EV) vehicles are equipped with a Motor and Reduction Gear System, also kno… |
| 24-EV-003H | Service bulletin | Mar 6, 2024 | Certain 2022-2024 MY IONIQ 5 (NE1) and 2023MY IONIQ 6 (CE1) may have a condition of the power down warning light (turtle symbol) with "Power… |
| 23-HA-002H | Service bulletin | Aug 7, 2023 | Certain IONIQ 5 (NE1) vehicles may experience an inoperative heater or air conditioning with one or more HVAC system related DTCs B169588, B… |
| 23-01-017H-1 | Service bulletin | Jun 27, 2023 | This bulletin provides the information to inspect and add the Battery Conditioning function as necessary. Some late 2022MY vehicles may alre… |
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 TDW a recall?
No. A service campaign 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 TDW repair free?
A service campaign is usually paid by the manufacturer on the vehicles it names, within the terms and time limit the document sets; the dealer checks the VIN against the manufacturer’s list.
Which vehicles does TDW cover?
The manufacturer filed it against 1 model year: 2025 Hyundai Ioniq 5. 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: 2025 IONIQ 5 (NEA EV): built 3 Dec 2024 – 25 Mar 2025 — the build date is on the certification label in the driver’s door jamb.