TSB 26-01-035H — Hyundai Service campaign
26-01-035H is a service campaign on file with NHTSA for 6 Hyundai models, 2024–2026 model years. A TSB is factory repair guidance, not a recall — the repair is not automatically free.
What the bulletin says. 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)…
NHTSA's own summary of the document, quoted from the public manufacturer-communications file.
Worth checking your VIN against. 26-01-035H is filed as a service campaign, which unlike an ordinary bulletin can mean free or reimbursed work when a vehicle qualifies. Ask a dealer using the document ID below, and check open recalls separately at nhtsa.gov/recalls.
Vehicles and model years 26-01-035H names
| Vehicle | Model years |
|---|---|
| Hyundai Ioniq 5 | 2025, 2026 |
| Hyundai Kona | 2024, 2025, 2026 |
| Hyundai Palisade | 2026 |
| Hyundai Santa Fe | 2024, 2025, 2026 |
| Hyundai Sonata | 2024, 2025, 2026 |
| Hyundai Tucson | 2025, 2026 |
Every document filed under 26-01-035H
| Document ID | Filed | Type |
|---|---|---|
| 26-01-035H TSB | April 8, 2026 | Service campaign |
What 26-01-035H covers
Electrical — the component vocabulary NHTSA files this communication under.
Questions buyers ask
What is TSB 26-01-035H?
26-01-035H is a service campaign filed with NHTSA by Hyundai, covering 6 Hyundai models across the 2024–2026 model years. NHTSA's summary reads: 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)…
Which vehicles does 26-01-035H cover?
NHTSA's file names Hyundai Ioniq 5 (2025–2026); Hyundai Kona (2024–2026); Hyundai Palisade (2026); Hyundai Santa Fe (2024–2026); Hyundai Sonata (2024–2026); Hyundai Tucson (2025–2026). A bulletin number can be re-issued against more vehicles later, so check the model-year list on this page against your own.
Is TSB 26-01-035H a recall, and is the repair free?
26-01-035H is filed as a service campaign, not a recall — but this is the kind of communication that can mean free or reimbursed work if your VIN qualifies. Take the number to a dealer and ask. Recalls are separate and always free; check yours by VIN at nhtsa.gov/recalls.
How do I get the full text of 26-01-035H?
Take the document ID to a dealer's service desk, or search NHTSA's manufacturer-communications records. This page carries every document ID filed under 26-01-035H, its date, and NHTSA's own summary from the public file.
Every number on this page is a count of records in the federal complaint, recall, and investigation files published by NHTSA's Office of Defects Investigation. This page lists only what NHTSA's manufacturer-communications file records under 26-01-035H. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.