2017 Hyundai Sonata Hybrid Electrical System Problems
NHTSA lists 19 Electrical System complaints for the 2017 Hyundai Sonata Hybrid, 24% of its 80 total complaints for the year. Owners commonly report HEV warning lights, sudden power loss or limp mode, and stalling, with a median failure mileage of 85,839. A related recall, 21V749000, covers Smart Junction Box software.
- Electrical System complaints
- 19
- 24% of 80
- Crashes reported
- 0
- Fires reported
- 0
- Injuries reported
- 0
- Median mileage
- 85,840 mi
- Related recalls
- 1
Typical electrical symptoms owners report
- Owners report the HEV warning light illuminating along with multiple other dashboard warnings, sometimes followed by the engine powering down while driving.
- Some describe the car entering limp mode at highway speed, with several unknown warning lights on and a subsequent tow to the dealer.
- Several owners describe a "Check Hybrid System, Shut Off Engine" message appearing repeatedly, sometimes with battery, engine, and collision warning lights all lit at once.
- Some report the vehicle stalling or losing acceleration on the highway with no warning lights on beforehand, later diagnosed as a power relay assembly or battery issue.
- A few owners mention the vehicle jerking forward and losing power unexpectedly on the freeway, requiring the car to be pulled over.
- Owners also mention delays getting the Smart Junction Box software recall (21V749000) performed, with wait times reported in months.
When 2017 Hyundai Sonata Hybrid electrical complaints were filed
First complaint Sep 5, 2018, latest Nov 29, 2025.
Electrical System recalls for the 2017 Hyundai Sonata Hybrid
- NHTSA 21V749000Sep 24, 2021Electrical System469,377 vehicles
Electrical system:software
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.
Risk: A turn signal that activates in the opposite direction of what was intended by the driver increases the risk of a crash.
Remedy: 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.
Electrical System complaints by Sonata Hybrid model year
Raw complaint counts per model year; newer years have had less time to accumulate complaints.
Frequently asked questions
- How many electrical system complaints does NHTSA have for the 2017 Hyundai Sonata Hybrid?
- NHTSA lists 19 Electrical System complaints for the 2017 Sonata Hybrid, which is 24% of the 80 total complaints filed for that model year.
- Is there a recall for electrical problems on the 2017 Hyundai Sonata Hybrid?
- Yes. Recall 21V749000, reported September 24, 2021, covers the Smart Junction Box software, which may not properly interpret certain signals. Dealers update the SJB software free of charge.
- At what mileage do electrical failures typically show up?
- The median mileage at failure for Electrical System complaints on this model year is 85,839 miles.
- Did the 2017 Sonata Hybrid electrical issues cause crashes or injuries?
- NHTSA data for this problem area on the 2017 Sonata Hybrid lists 0 crashes, 0 fires, and 0 injuries.