Can’t start your Hyundai Sonata due to a dead battery? Learn how to fix the problem by replacing the battery on your Hyundai Sonata. This guide shows instructions on replacing a Hyundai Sonata battery,  model years 2011-2014.

Symptoms of a weak or dead battery on a Hyundai are:

  • car won’t start,
  • engine turns over very slow
  • hearing a click when trying to start the engine

You may also find clues to the battery’s condition by inspecting the battery for acid built up at the terminals.  Check the battery terminal for looseness and the presence of corrosion. If this is the case, you may not need a new battery; you might need to clean the corrosion out and tighten the terminal nut.

What you will need

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  • New Hyundai Battery


  • 10mm wrench
  • 12mm socket wrench
  • Ratchet


  1. Park the vehicle on level ground. Set the parking brakes and open the hood by pulling the hood release under the dashboard.
  2. Loosen and remove 10mm battery terminal nuts.remove-nuts
  3. Remove the battery pole terminal and set it aside; always remove the negative side first.
  4. Remove battery support clamp by detaching a 12mm bolt using a socket wrench and a ratchet.remove-support-clamp
  5. Lift the battery out of the car.
  6. Place the new battery in the battery tray.
  7. Lock the battery in place by installing the battery clamp, secured by a 12 mm bolt. Tighten the clamp bolt.
  8. Clean the battery terminals using a battery terminal brush or sandpaper.
  9. Install the positive battery terminal first, then fasten the 10mm nut.
  10. Install the negative battery terminal, then fasten the 10mm nut.
  11. Close the positive battery insulator.
  12. Start the car.
  13. Re-check with a voltmeter; the voltage should be 13-14 volts.

Isolating the alternator problem from the battery is also a good idea; start the car and measure the voltage from the battery terminal; it should be between 13-14 volts.

Frequently Asked Questions

How Does a Car Battery Work?

Most, but not all, passenger vehicles on the road use what’s called a “lead-acid battery.” Inside the sturdy plastic casing are several metal plates surrounded by sulfuric acid. A reaction between the two takes place, which produces chemical energy. The battery then converts the chemical energy into electrical energy, which starts and powers your car.

Can My Car Battery Freeze?

A fully charged lead-acid battery has a freezing point of below -40F. However, most sulfate ions are consumed if the battery is fully discharged. An electrolyte solution comprised mostly of water with a freezing point of 32F.

How much does it cost to get a battery replaced?

Depending on size, quality, and power, it will cost around $45-$250.

The battery won’t accept a charge current for those who live in cold climates to come out to your car on a freezing day. At this point, it will need to be warmed up before accepting a charge. Once it’s charged up completely, it won’t freeze until it’s fully discharged again.

We hope you find the 2011-2014 Hyundai Sonata Battery Replacement guide helpful. Check these troubleshooting and repair guides for more help on your Hyundai Sonata.

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