AI Damage2026 Hyundai Sonata: common problems
The maker issued 17 service bulletins for this year. Details by component below, with sources.
Key figures
- Technical service bulletins (TSB)
- 17
Engines and transmissions
US-market versions per EPA. On the right: how many NHTSA complaints name this engine or transmission type.
- 2.5 L · petrol · 4 cyl
- 2.5 L · petrol · turbo · 4 cyl
- 2 L · hybrid · 4 cyl
- automatic, 8-speed
- dual-clutch (DCT), 6-speed
- dual-clutch (DCT), 8-speed
Drive: FWD, AWD
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Electrical system | 0 | 0 | 6 |
| Powertrain | 0 | 0 | 3 |
| Air bags | 0 | 0 | 2 |
| Engine | 0 | 0 | 2 |
| Exterior lighting | 0 | 0 | 2 |
| Structure | 0 | 0 | 2 |
| Forward collision avoidance | 0 | 0 | 1 |
| Lane departure | 0 | 0 | 1 |
Comparison
What to check before buying
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
- Air bags. Check the SRS light, stored codes and airbag/curtain status after any impact.
- Engine. Cold start, unusual noises, oil leaks and engine codes.
Manufacturer service bulletins
Bulletin titles as filed with NHTSA.
- Some vehicles equipped with internal combustion engines may exhibit higher-than-expected engine oil…
Some vehicles equipped with internal combustion engines may exhibit higher-than-expected engine oil consumption. This bulletin outlines the combustion chamber cleaning procedure for vehicles diagnosed with this…
- Certain vehicles equipped with internal combustion engines may exhibit higher-than-expected engine oil…
Certain vehicles equipped with internal combustion engines may exhibit higher-than-expected engine oil consumption. This bulletin provides the inspection and repair procedures for vehicles exhibiting this condition…
- Certain Sonata (DN8) vehicles may exhibit a transmission oil leak at the bottom of the valve body cover…
Certain Sonata (DN8) vehicles may exhibit a transmission oil leak at the bottom of the valve body cover due to a loose oil level plug that could potentially lead to a total failure of the automatic transmission. This…
- Certain Sonata (DN8) vehicles may exhibit a transmission oil leak at the bottom of the valve body cover…
Certain Sonata (DN8) vehicles may exhibit a transmission oil leak at the bottom of the valve body cover due to a loose oil level plug that could potentially lead to a total failure of the automatic transmission…
- Certain 2026MY Sonata (DN8) and 2026MY Sonata Hybrid (DN8 HEV) vehicles may exhibit a fuel filler door…
Certain 2026MY Sonata (DN8) and 2026MY Sonata Hybrid (DN8 HEV) vehicles may exhibit a fuel filler door that is difficult to open due to the push-type opener mechanism. Technical Bulletin (TSB) 26-01-057H provides…
- Certain Sonata (DN8) and Sonata Hybrid (DN8 HEV) vehicles may exhibit a fuel filler door that is difficult…
Certain Sonata (DN8) and Sonata Hybrid (DN8 HEV) vehicles may exhibit a fuel filler door that is difficult to open due to the push-type opener mechanism. This bulletin provides instructions to inspect the fuel filler…
- Certain 2024-2026MY Sonata (DN8) and 2024-2026MY Sonata Hybrid (DN8 HEV) vehicles may exhibit intermittent…
Certain 2024-2026MY Sonata (DN8) and 2024-2026MY Sonata Hybrid (DN8 HEV) vehicles may exhibit intermittent battery discharge condition due to the air conditioning controller not fully powering down after the vehicle is…
- Certain Sonata (DN8) vehicles may exhibit intermittent battery discharge condition due to the air…
Certain Sonata (DN8) vehicles may exhibit intermittent battery discharge condition due to the air conditioning controller not fully powering down after the vehicle is turned off and parked. This bulletin provides the…
- This bulletin provides information related to a Transmission Control Unit (TCU) software update for some…
This bulletin provides information related to a Transmission Control Unit (TCU) software update for some vehicles equipped with an 8-speed wet dual clutch transmission (8WDCT). The software update revises the touch…
- The National Highway Traffic Safety Administration (NHTSA) has identified the presence of substandard and…
The National Highway Traffic Safety Administration (NHTSA) has identified the presence of substandard and dangerous driver’s-side airbag inflators manufactured by Jilin Province Detiannuo Automobile Safety System Co…
- The National Highway Traffic Safety Administration (NHTSA) has issued an urgent safety advisory regarding…
The National Highway Traffic Safety Administration (NHTSA) has issued an urgent safety advisory regarding dangerous, counterfeit driver‑side airbag inflators manufactured by Jilin Province Detiannuo Automobile Safety…
- 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) network connection and if needed, reset the DCU…
NHTSA lists 17 bulletins for this year; the 12 newest are shown here.
Other years of this model
Questions and answers
What are the most common problems with the 2026 Hyundai Sonata?
There are no owner complaints in the NHTSA data for this year; the data comes from 17 manufacturer service bulletins.
How many service bulletins (TSB) were issued for the 2026 Hyundai Sonata?
NHTSA lists 17 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 2026 Hyundai Sonata from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Other 2026 models
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-04.