2018 Hyundai Tucson electrical system problems
27 owner complaints filed with NHTSA name the electrical system on the 2018 Hyundai Tucson — 7% of all complaints for this model year.
What owners report
“While driving my 2018 Hyundai Tucson Limited 1.6L Turbo with the 7-speed EcoShift dual clutch transmission (DCT), the vehicle has repeatedly failed to engage and hold gears, resulting in loss of motive power in traffic. Diagnostic scanning retrieved codes P074B (Unable to Engage Gear 3), P074B71…”
filed Jul 7, 2026
“While idling at a standstill (in a drive-thru queue), my 2018 Hyundai Tucson suddenly experienced a severe engine overheat, causing the vehicle's air conditioning system to immediately blow hot air and shut down. The vehicle was brought directly to an authorized Hyundai dealership (Chapman Hyundai…”
filed Jun 10, 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% |
| 2021 Tucson | 11 | 15% |
| 2020 Tucson | 19 | 11% |
| 2019 Tucson | 46 | 12% |
| 2017 Tucson | 83 | 8% |
| 2016 Tucson | 213 | 13% |
| 2015 Tucson | 20 | 9% |
| 2014 Tucson | 15 | 8% |
Other reported problem areas on the 2018 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.