How to Replace the Battery in a Purchased Car Key?
2 Answers
The method to replace the battery in a purchased car key is as follows: 1. Slide the safety switch on the remote key; 2. Remove the mechanical key; 3. Insert the mechanical key into the gap at the bottom to pry open the shell; 4. Use a hard card to pry out the old battery from the battery slot and replace it with a new battery of the same model; 5. Reassemble the shell and reinsert the mechanical key. The maintenance methods for the key include: 1. Avoid frequently placing it with metal items; 2. Do not store the spare key in the car door; 3. Prevent the smart key from falling or being impacted; 4. Keep the smart key away from high-temperature environments or contact with liquids; 5. Avoid placing the key together with electronic devices.
Just changed the key battery for my old Toyota last week, and it was actually quite simple. First, check if there's a small groove or screw hole on the side of the key—foldable keys usually hide a screw under the Toyota logo. Use a fine Phillips screwdriver to unscrew it, and when prying open the shell, place a cloth underneath to prevent scratches. Most importantly, remember the battery model. For example, old Camrys use CR2032—don’t get the wrong one. Use a toothpick to pry out the old battery, and when installing the new one, pay attention to the orientation—the metal side should face down and align with the spring contact. After installation, test the lock button. My neighbor didn’t secure the shell properly last time, and rainwater damaged the circuit board. Watching a video online for your specific car model is much more helpful than reading the manual. The dealership charges 200 yuan for a battery replacement, but buying a Panasonic battery yourself costs just 8 yuan.
