2021 Hyundai Tucson electrical system problems
11 owner complaints filed with NHTSA name the electrical system on the 2021 Hyundai Tucson — 15% of all complaints for this model year.
What owners report
“Vehicle stalled approximately 15 times between April 17 and May 4, 2026, including once on Interstate XXX at approximately 50mph with minor children ages [XXX] and [XXX] in the vehicle. The oil and battery lights illuminated simultaneously at each stall. Diagnosed as ABS module failure first, then…”
filed May 12, 2026
“In October 2025, while the vehicle was still under Hyundai’s 5-year warranty, an authorized Hyundai dealership diagnosed a significant electrical failure affecting the ABS/ESC system on my 2021 Hyundai Tucson. The vehicle was experiencing multiple dashboard warning lights, intermittent key fob…”
filed Apr 29, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related service bulletins
Certain Santa Fe (TMA), Santa Fe Sport (AN), Sonata (LFA), and Tucson (TL) vehicles equipped with Theta II engines may exhibit elevated engine-out emissions. This bulletin provides instructions for updating the Engine…
26-01-013H-2 TSB · Service Campaign · issued May 21, 2026Following completion of Service Campaign 9C2 (Theta II Emissions Improvement), certain vehicles may exhibit a brief hesitation or rough shifting condition during cold start operation. If present, this condition is…
9C2 060518 · Service Campaign · issued May 19, 2026Following completion of Service Campaign 9C2 (Theta II Emissions Improvement), certain vehicles may exhibit a brief hesitation or rough shifting condition during cold start operation. If present, this condition is…
9C2 DCS 260518 · Service Campaign · issued May 19, 2026
Electrical System problems in other Tucson years
| Year | Reports | Share |
|---|---|---|
| 2026 Tucson | 7 | 13% |
| 2025 Tucson | 58 | 22% |
| 2024 Tucson | 16 | 18% |
| 2023 Tucson | 25 | 20% |
| 2022 Tucson | 49 | 13% |
| 2020 Tucson | 19 | 11% |
| 2019 Tucson | 46 | 12% |
| 2018 Tucson | 27 | 7% |
| 2017 Tucson | 83 | 8% |
| 2016 Tucson | 213 | 13% |
| 2015 Tucson | 20 | 9% |
| 2014 Tucson | 15 | 8% |
Other reported problem areas on the 2021 Hyundai Tucson
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.