2015–2017 Hyundai Sonata, 2016–2017 Hyundai Sonata Hybrid, 2016–2017 Hyundai Sonata Plug-In Hybrid Recall: Smart Junction Box (SJB) software logic may not properly interpret the…
NHTSA campaign 21V749000 · Electrical System · filed Sep 24, 2021 · verified Jul 30, 2026
The defect
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.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →The fix — what to do
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.
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.
Affected vehicles
Related recalls
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Other campaigns involving Hyundai vehicles
Source: NHTSA recall database, campaign 21V749000 (manufacturer number 210). Data last verified Jul 30, 2026.