Recall 21V749 covers 469,377 2015-2017 Hyundai Sonata, Sonata Hybrid, and Sonata Plug-In Hybrid vehicles for reversed turn signals. Free repair at franchised Hyundai dealers.
Hyundai is recalling 469,377 2015-2017 Sonata, Sonata Hybrid, and Sonata Plug-In Hybrid vehicles because Smart Junction Box software can read the multifunction switch incorrectly and activate the turn signal in the opposite direction. That wrong signal increases crash risk, and Hyundai dealers will complete the recall repair free of charge.
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What's wrong?
The Smart Junction Box on affected 2015-2017 Hyundai Sonata, Sonata Hybrid, and Sonata Plug-In Hybrid vehicles is an electronic control unit for body functions. For the turn signals, it reads the multifunction switch, the steering-column control the driver moves for left or right signaling, then sends the command to the exterior lamps and the instrument cluster.
In this recall, the software inside that box does not read the switch signal correctly. The driver can move the switch for one direction, but the software interprets the signal as the other direction. That activates the opposite turn signal from the one the driver intended, so traffic around the vehicle receives the wrong signal.
If the condition happens, the driver should see the unintended turn signal direction on the instrument cluster. That visible mismatch is the warning sign to stop relying on the signal direction and arrange the free Hyundai recall repair.
Who's affected?
Spans Sonata, Sonata Hybrid, and Sonata Plug-In Hybrid across 2015-2017, all tied to the smart junction box software and turn signal function.
| 2017 Hyundai Sonata | electrical system software |
|---|---|
| 2017 Hyundai Sonata | Turn signal |
| 2016 Hyundai Sonata | electrical system software |
| 2016 Hyundai Sonata | Turn signal |
| 2015 Hyundai Sonata | electrical system software |
| 2015 Hyundai Sonata | Turn signal |
| 2016 Hyundai Sonata Hybrid | electrical system software |
| 2016 Hyundai Sonata Hybrid | Turn signal |
| 2017 Hyundai Sonata Plug-In Hybrid | electrical system software |
| 2017 Hyundai Sonata Plug-In Hybrid | Turn signal |
| 2017 Hyundai Sonata Hybrid | electrical system software |
| 2017 Hyundai Sonata Hybrid | Turn signal |
| 2016 Hyundai Sonata Plug-In Hybrid | electrical system software |
| 2016 Hyundai Sonata Plug-In Hybrid | Turn signal |
| Units affected | 469,377 |
The year and model narrow the scope, but the VIN decides. Check your VIN to confirm whether your specific sedan is included.
What's the safety risk?
A turn signal that activates in the opposite direction can mislead other drivers and increases the risk of a crash. If this happens, the wrong signal direction is visible on the instrument cluster. Watch the cluster, drive cautiously, and schedule the software update soon. Repair is free at any franchised Hyundai dealer.
What should I do?
- Check your VIN to confirm your 2015-2017 Hyundai Sonata, Sonata Hybrid, or Sonata Plug-In Hybrid is included in this recall.
- Contact a franchised Hyundai dealer to schedule the free SJB software update that fixes the turn-signal logic.
- Bring the recall notice if Hyundai mailed one, or reference recall number 21V749 when you call.
- Use extra care when signaling turns or lane changes until the repair is complete, because the signal can activate opposite the direction you select.
What happens at the repair
At the dealer, a Hyundai technician updates the Smart Junction Box software so it properly reads signals from the multifunction switch. The software update is free under the recall, with parts and labor covered. If you already paid for a related SJB software or turn signal repair, Hyundai's reimbursement plan covers documented costs. Bring repair paperwork and receipts to the service desk, or contact Hyundai customer service to start the claim.
| Reimbursement | Reimbursement available |
|---|
Timeline
| September 24, 2021 | NHTSA published the recall |
|---|---|
| November 19, 2021 | Dealer notification began |
| November 19, 2021 | Dealer notification ended |
| November 19, 2021 | Owner notification mailed |
| November 19, 2021 | Interim owner notification (was planned for this date) |
Frequently asked questions
What is recall 21V749?
Recall 21V749 covers 469,377 2015-2017 Hyundai Sonata, Sonata Hybrid, and Sonata Plug-In Hybrid vehicles. The Smart Junction Box software can read the multifunction switch incorrectly, causing the turn signal to flash in the opposite direction. Hyundai dealers will update the software for free.
What should I do if my 2015-2017 Hyundai Sonata, Sonata Hybrid, or Sonata Plug-In Hybrid is on this recall?
Check your VIN to confirm your specific vehicle is included in recall 21V749. If it is, contact a franchised Hyundai dealer to schedule the Smart Junction Box software update. Reference recall number 21V749 or Hyundai recall 210 when you call.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to repair the defect at no cost, and Hyundai's remedy states that dealers will update the Smart Junction Box software free of charge. Parts and labor are covered at any franchised Hyundai dealer.
What is the safety risk?
The safety risk is a turn signal that flashes opposite the direction the driver intended. That can give nearby drivers, cyclists, or pedestrians the wrong information about your next move, increasing crash risk. The dealer repair fixes the software logic at no cost.
What if I bought this Hyundai used?
The free recall repair still applies. Recall eligibility follows the VIN, not the first owner, so a used Sonata, Sonata Hybrid, or Sonata Plug-In Hybrid still qualifies if its VIN is included. Check your VIN, then call a Hyundai dealer with recall number 21V749.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/21V749000 |
|---|---|
| Hyundai customer service | 1-855-371-9460 |
| NHTSA recall # | 21V749 |
| NHTSA recall # (full) | 21V749000 |
Source documents
-
Download Recall Document (PDF) (PDF) - Download Quarterly Report (PDF)
- Download Misc. Document (PDF)
- Download Recall Investigation Document (PDF) (PDF)
- Download Owner Notification Letter (PDF)
- Download Owner Notice (PDF)
- Download Recall Report (PDF)
- Download Recall Acknowledgement (PDF)
This article is generated from NHTSA's primary recall filings and reviewed against the source on May 20, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →