How to Replace the Key Battery for a Sonata 8?
2 Answers
The steps to replace the battery for a Sonata 8 key are as follows: 1. Flip to the tail end of the key, where there is a push button. Push it upwards, and the metal key inside will pop out. At this point, you can pull out the key. Then, look for a gap at the tail end of the key. You can use a tool to assist in prying it open. Apply a little force to pry, and the outer shell of the key can be opened. 2. After opening the shell, the key may be positioned deep inside and might not come out easily. In this case, you can slide along the side gap, pry upwards, and then remove the old battery. Replace it with a new battery. After installing the new battery, be sure to check that the positive side is facing upwards. Once the battery is securely in place, insert the shell back and cover it, then reinsert the mechanical key.
I think changing the battery for a Sonata 8 key is actually quite simple. I just did it myself last week. That day, the remote control stopped working—pressing the unlock button had no response—so I knew it was time to replace the battery. The steps are: first, locate the small button on the top of the key, press it to remove the mechanical key part, then gently pry open the key casing using a small screwdriver or a coin. Inside, you'll see a small battery slot. The old battery is usually a CR2032 model—carefully remove it without dirtying the contacts, and buy a new battery of the same model, which only costs a few bucks at the store. When installing, pay attention to the orientation; don't put it in backward, or it won't work. After inserting the new battery, close the casing and press the key a few times to test the functions. I also recommend keeping a spare battery in the car for emergencies in case the current one dies unexpectedly. The whole process takes about five minutes, saving you a trip to the repair shop, and it feels quite rewarding to do it yourself.
