How to Replace the Battery in a Hyundai Elantra Car Key?

[VanHazel]

Modern Elantra car key battery replacement method is: 1. Pull out the mechanical key, you will see a gap in the middle of the plastic shell, use a flat screwdriver to pry it open; 2. Remove the old battery and replace it with a new one, paying attention to the installation direction of the positive and negative poles; 3. After replacement, firmly press the separated key parts together to close. Taking the 2016 Hyundai Elantra as an example, it belongs to the compact car category, with body dimensions of: length 4570mm, width 1775mm, height 1445mm, wheelbase 2700mm, fuel tank capacity 50l, curb weight 1233kg. The 2016 Hyundai Elantra features a front suspension of MacPherson independent suspension, rear suspension of torsion beam non-independent suspension, equipped with a 1.6L naturally aspirated engine, maximum horsepower 128ps, maximum power 93.8kw, maximum torque 156nm, matched with a 6-speed manual transmission.

[OJordan]

I just replaced the key battery for my 2017 Elantra, and it was quite easy. First, I bought a CR2032 button battery at a stationery store for just a few yuan. On the side of the car key, there's a small slot—just use a coin or your fingernail to pry it open along the groove, and the back cover pops off. Be careful not to use too much force, as the plastic clips are quite fragile. Then, remove the old battery, place the new battery with the printed side facing up, and you'll hear a click when it snaps into place. Finally, align the back cover and press it back on, then test the lock/unlock buttons—if the red light turns on, you're done. The whole process takes less than three minutes, saving over 200 yuan compared to going to a 4S shop. It's recommended to replace it every two years to avoid sudden power loss causing inconvenience.

[MollyLee]

Last week, my girlfriend's Elantra key fob stopped working, so I replaced the battery for her. All you need is a small Phillips screwdriver and a CR2032 battery. First, pull out the metal strip at the end of the key to reveal the plastic shell's clips. Gently pry open the shell seam with the screwdriver, being careful not to scratch the surface. It's best to wear gloves when removing the old battery to avoid leaving fingerprints on the circuit board. Insert the new battery in the original orientation with the metal side facing down. After ensuring the battery is securely in place, close the shell and press along the edges until all clips snap back into position. Testing it, the car lights responded very responsively—much simpler than I imagined. This kind of hands-on task is easy to remember after doing it once, saving both time and money.

[AnnaAnn]

The experienced mechanic at the repair shop told me there are three key points when replacing the battery for a Lantra key: First, make sure the battery model is CR2032, as the wrong size won't fit. Second, pay attention to the battery's orientation - usually the side with letters faces toward the casing. Third, use a plastic tool to pry open the cover to avoid scratches. The actual process is just four steps: remove the mechanical key, pry open the back cover, replace the battery, and reassemble the casing. The whole procedure is hard to mess up, though the casing might be a bit stubborn to open. He recommends doing this while parked, so if anything goes wrong you can still use the mechanical key to open the door.