How to Replace the Battery in a Lexus Car Key?
2 Answers
To replace the battery in a Lexus remote car key, you will need the small mechanical key inside the remote key. Follow these three steps: 1. Remove the small mechanical key from the remote key. 2. Locate a small groove in the middle of the plastic shell of the car key, insert the mechanical key into the groove, and gently pry it open. 3. Once opened, you will see the battery, which can then be replaced. (Note: The battery model for a Lexus remote key is CR2032, a 3V coin cell. When installing the battery, pay attention to the positive and negative poles. After replacing the battery, do not immediately reassemble the plastic shell; first, test whether the key can unlock the car before reassembling the shell.)
I remember changing the battery in my Lexus key fob several times, and the method is actually quite simple. First, observe the side or back of the key fob—there's usually a hidden small slot or button. Gently pry open the plastic cover using a coin or a small screwdriver, being careful not to apply too much force to avoid cracking it. Once opened, you'll see a round coin battery, typically a CR2032 model. When removing the old battery, avoid touching the positive and negative terminals directly with your fingers to prevent oxidation. Insert the new battery with the positive side facing up, then close the cover and press lightly until you hear a click to secure it. After finishing, test it immediately: walk up to your car and press the key fob button to check if the locking function responds. It's recommended to replace the battery every two years—these batteries are cheap and easily available at supermarkets or online. If you find it difficult to pry open, search for video tutorials specific to your Lexus model online—I often do this, and it works well. The whole process takes no more than five minutes, saving money and hassle.
