Hyundai Recall 21V-749: Electrical system – software

Affected: 2015–2017 Hyundai Sonata, 2016–2017 Hyundai Sonata Hybrid, 2016–2017 Hyundai Sonata Plug-In Hybrid. Filed with NHTSA on September 24, 2021, covering about 469,377 vehicles.

The problem

Hyundai Motor America (Hyundai) is recalling certain 2015-2017 Sonata, 2016-2017 Sonata Hybrid, and Sonata Plug-In Hybrid vehicles. The Smart Junction Box (SJB) software logic may not properly interpret the signals received from the multifunction switch, which could cause the turn signal to activate in the opposite direction of what the driver intended.

The risk

A turn signal that activates in the opposite direction of what was intended by the driver increases the risk of a crash.

The fix

Dealers will update the SJB software, free of charge. Owner notification letters were mailed November 19, 2021. Owners may contact Hyundai customer service at 1-855-371-9460. Hyundai's number for this recall is 210.

Recall details

NHTSA campaign21V-749 (21V749000)
Manufacturer number210
ManufacturerHyundai Motor America
ComponentElectrical system › Software
Report dateSeptember 24, 2021
Owners notifiedNovember 19, 2021
Vehicles affected469,377
Initiated byManufacturer

Vehicles covered

Owner complaints about the electrical system

Frequently asked questions

Is the recall 21V-749 repair free?

Yes. Hyundai dealers will fix the problem at no cost: Dealers will update the SJB software, free of charge. Owner notification letters were mailed November 19, 2021. Owners may contact Hyundai customer service at 1-855-371-9460. Hyundai's number for this recall is 210.

How do I know if my car is included?

Not every vehicle of the listed model years is affected — the recall covers 469,377 vehicles built in a certain window. Check your 17-character VIN with our VIN recall check or at nhtsa.gov/recalls.

Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.