How to Replace the Battery in a BMW Key?
2 Answers
Here are the steps to replace the battery in a BMW key: 1. First, remove the key from the remote control. 2. You will see a small square on the key; remove the old battery and replace it with a new one. Note that the battery cannot be recharged once depleted, so the old battery must be removed. 3. Insert the new battery with the positive side facing up and reassemble the key by reversing the disassembly steps. Additional information: 1. BMW is a German automotive brand under the BMW Group, offering models such as the I, X, Z, and pure number series (e.g., 1, 2, 3), along with the performance-oriented M series based on these models. 2. Taking the BMW 3 Series as an example: its dimensions are 4719mm in length, 1827mm in width, and 1459mm in height, with a wheelbase of 2851mm. It is equipped with an 8-speed automatic transmission and has a top speed of 222 kilometers per hour.
I previously replaced the battery in my BMW key fob, and the whole process was actually quite simple, requiring minimal tools. First, use a small blade or thin card to gently pry open the casing by inserting it into the edge gap—be careful not to use too much force to avoid damaging the plastic clips. Inside, there's a small round CR2032 battery; carefully remove it while noting the positive and negative terminal positions. You can buy a new battery at a supermarket or online for just a few RMB—avoid cheap, low-quality ones as they won’t last long. When reinstalling, ensure the positive side faces up and aligns correctly, then press it in gently and snap the casing shut. Finally, stand near your car and press the unlock button a few times to confirm it works properly. If you run into trouble, don’t force it—ask a handy friend for help instead. These batteries typically need replacement every 1-2 years, and storing the key in a cool place can extend its lifespan.
