How to Start a Hyundai Car When the Key Fob Battery is Dead?
2 Answers
Modern car key fobs come with a mechanical key for starting the vehicle when the battery is dead. Insert this backup key into the keyhole to unlock. Some models have hidden keyholes under decorative covers on door handles for aesthetic purposes - simply remove the cover to access the keyhole. Opening the door with the mechanical key will trigger the anti-theft system because each key fob contains a unique ID chip that communicates with the car. Since the mechanical key doesn't transmit this signal, the alarm will activate. To deactivate the alarm, simply start the vehicle - this will automatically reset the security system.
I just had this happen last week! After work, the key fob wouldn't respond no matter what, and I almost panicked. Most Hyundai vehicles have a hidden induction area under the cup holder or center console—just press the key against it, step on the brake, and hit the start button. The mechanical keyhole is concealed under a decorative cover on the door handle, which you can pry open with your fingernail. The funniest part is that some high-end models allow remote engine start via a smartphone app, but it gets awkward when there's no signal in underground parking. Also, I noticed the key fob flashes a red light when the battery is running low—if you see a weak signal, replace the battery ASAP (it only costs about 10 yuan). Another trick: pressing the key against the start button can boost the signal, which saved me once in the wilderness. One last reminder: after mechanical startup, the steering wheel lock might not release, requiring you to turn off and restart the car.
