Owners of other Hyundai, Kia and Genesis vehicles such as the Santa Fe, Kona, Elantra, Sonata, Accent, Veloster, Ioniq, Nexo, G80, G90, Stinger, Rio, Forte, Optima, Cadenza, K900, Soul, Niro, Sportage, Sorento and Sedona may also find these DIY instructions to be helpful.

The OEM 12V battery is a Rocket CMF68L-DIN (or CMF68L DIN) which is a "Group Size" 124F.

A few other compatible replacement 124F batteries with their part numbers are as follows: Hyundai 37110-24001U, EverStart MAXX-124R (Walmart), AutoCraft Gold 24FH, Napa Legend BAT 75124R and ProStart # 24FH700PS.

The tools and other items needed to complete this procedure include a small flathead screwdriver, a 10mm socket with a 1/4" drive ratchet, a 12mm socket with a long extension bar and a 3/8" drive ratchet.

The 12V car battery is located under the black plastic engine air intake assembly that is attached to the front of the engine bay and leads to the air filter box.

Locate the two round black plastic pop rivet fasteners on the front edge of the air intake assembly.

Gently pry up the smaller center part of each fastener to unlock them.

Then pry out the base of the fastener.

Set the two pop rivets aside in a safe place.

Set the air intake aside in a safe place.

Once the air intake assembly is out of the way, you'll be able to see the old 12V battery.

Pull the negative terminal off the "-" battery post.

Wrap the negative terminal in a small towel and tuck it away on the right side of the battery to help prevent accidental electrical contact.

Locate the battery hold down bar and the single bolt that holds it in place at the front bottom edge of the 12 volt battery.

Loosen the 12mm bolt by turning it in the counterclockwise direction.

There should be a plastic retaining washer attached to the 12mm bolt to keep it safely attached to the hold down clamp.

Push in the release tab on the black plastic cover on the positive terminal.

Swing open the plastic cover to reveal the positive "+" terminal.

Loosen the nut on the positive terminal by turning it in the counterclockwise direction a few turns.

Close the plastic cover over the positive terminal and tuck it away on the left side of the battery.

Pull the heat shield cover off the old battery and set it aside.

Raise the two handles on the top of the old battery.

Carefully lift the old battery out of the engine bay and set it on the ground.

Avoid tipping over or dropping the old battery to prevent from having acid leak out.

Be sure to bring the old battery with you to Walmart or the auto parts store to prevent from having to pay a "core", "recycling" or "disposal" fee.

Clean off any debris on the plastic battery tray in the engine bay so that the new battery will rest evenly on it.

If you can wait a few days for delivery, I recommend buying the genuine OEM Hyundai / Kia # 37110-24001U 12V battery.

The positive post should be on the left (passenger) side and the negative post should be on the right (driver) side.

Lower the heat shield cover over the new battery.

Push the positive terminal on to the "+" battery post on the left side.

Avoid over tightening the terminal nut to prevent from damaging or cracking the battery post which could cause an acid leak.

Swing the black plastic cover closed over the positive terminal.

Lower the hold down clamp down on to the front bottom edge of the new battery and the battery tray.

Tighten the bolt in the clockwise direction with the 12mm socket attached to a long extension bar and the 3/8" drive ratchet.

Double check that the new battery can not be moved, rocked or slid around on the battery tray.

If the new battery can be moved, tighten the hold down clamp bolt an extra turn or two.

Tighten the terminal nut by turning it in the clockwise direction with the 10mm socket and a 1/4" drive ratchet until it is snug.

Double check that both terminals are securely attached to the new battery.

Line up the rear of the air intake assembly with the opening in the air filter box.

Re-insert the two pop rivets into the openings on the front edge.

Push down the center part of each fastener to lock them into place.

Please remember to adjust the time on the clock and program your favorite radio station presets before you start driving.

Be sure to record the battery change in your vehicle's service records.

For more, check out all of my 2016-2018 Hyundai Tucson DIY Repair & Maintenance Guides.