How to Jump Start a Hyundai Sonata

1. Park the vehicles close enough for the cables to reach without touching, turn off all electrical devices, shift both to P (Park), apply the parking brake and turn both vehicles OFF.
2. Open the engine hood and remove the engine compartment fuse box cover.
3. Connect one jumper cable to the red, positive (+) battery terminal of your vehicle (1).
4. Connect the other end of that cable to the red, positive (+) battery/jumper terminal of the assisting vehicle (2).
5. Connect the second cable to the black, negative (-) battery/jumper terminal of the assisting vehicle (3).
6. Connect the other end of the second cable to the chassis ground of your vehicle (4).
7. Start the assisting vehicle and run it at about 2,000 RPM for a few minutes, then start your vehicle.
8. Disconnect the cables in exact reverse order: (4), (3), (2), then (1).

• Never connect the cable to the negative (-) jumper terminal of the discharged battery; a spark could make the battery explode.
• Keep your vehicle running at least 30 minutes at idle or driving; a fully discharged battery may need up to 60 minutes.
• Use only a 12 V power supply and do not try push-starting.

Source: 2026 Hyundai Sonata owner's manual, PDF pages 443, 444. Steps are summarized in our own words (AI-assisted, checked against the cited pages 2026-10-18). Other model years can differ; your manual has the final word.