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How to Replace the Battery in a Hyundai Car Key?

2 Answers

OJames

07/24/25 1:59am

Here are the steps to replace the battery in a Beijing Hyundai car key: 1. First, press the small silver button at the top of the car key. 2. Grab the top and pull out the mechanical key. 3. Insert the mechanical key into the slot and twist to pry open the car key cover. 4. After opening the car key, remove the circuit board to see the battery. 5. Remove the old battery and insert the new one. 6. Finally, reattach the circuit board and the car key cover. Below are the body specifications for the Beijing Hyundai: 1. Length: 4680mm. 2. Width: 1800mm. 3. Height: 1450mm. 4. Wheelbase: 2700mm. 5. Tire specifications: 205/55R16 or 225/45R217.

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JosephDella

08/10/25 9:37pm

Replacing the battery in a Hyundai car key is actually quite simple. Let me share my experience. First, you need to know that most Hyundai car keys use a CR2032 button battery, which can be easily found in supermarkets or online stores. Use a small knife or flathead screwdriver, locate the small gap on the key casing, and gently pry it open without applying too much force to avoid scratching the shell. Once opened, you'll see the old battery secured in its slot—carefully push it out without bending the contacts. Then, insert the new battery, making sure the positive and negative terminals are aligned correctly. For some models, the positive side faces up, so check the manual or online images to confirm. Before closing the casing, press the buttons a few times to test functionality and ensure the remote responds properly. The whole process may take just a few minutes and can save you the cost of visiting a dealership, where they often charge around a hundred bucks for the service. If your remote starts acting up, like only unlocking when you're close to the car, it's likely the battery is running low—DIY replacement is the most cost-effective solution. Remember not to pry too hard with sharp objects; plastic tools are safest to avoid damaging the internal circuitry. The entire process is as straightforward as replacing a phone battery.

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