How to Replace the Battery in a BMW 5 Series Remote?
2 Answers
BMW keys are roughly divided into five models. Below are the methods for replacing the battery in a BMW 5 Series remote: 1. For the G chassis key, first press the side button, pull out the mechanical key, insert it into the groove on the back cover, and the back cover will pop out. Then replace it with the prepared new battery. 2. For the F chassis and I chassis keys, first press the side button, pull out the mechanical key, insert it into the groove on the back cover, and the back cover will pop out. Then replace it with the prepared new battery. 3. The E chassis key does not require battery replacement; it automatically charges when placed in the ignition slot. 4. Finally, there is the BMW display key, which does not need to be opened to replace the battery. It can be charged via an adapter charging cable or the wireless charging module in the vehicle's center console.
As someone who frequently tinkers with cars, I find replacing the BMW 5 Series remote battery quite straightforward. First, confirm the battery model—usually a CR2032 coin cell, readily available at hardware stores. Use a small flathead screwdriver or plastic pry tool to gently open the case along the side seam of the key. Avoid excessive force, as the plastic clips can break easily. Inside, you'll see a silver battery; carefully remove it with a toothpick or fingernail, noting the polarity. Insert the new battery with the positive side facing down, press firmly, then snap the back cover shut. Finally, test if the unlock button's indicator light works. Avoid yanking the circuit board during the process, as it may compromise the key's water resistance. Keeping a spare battery in the glovebox is practical.
