How to Replace Bmw Key Fob Battery
How to Replace Bmw Key Fob Battery: This key fob type is used in most Bmw models. Series 1/ 3/ 5/ 7/ X3/ X5/ X7 all use this design. There are two models: One key fob comes with a replaceable battery and other one comes with a rechargeable battery.
Image below is a key fob with a replaceable battery from a BMW 3 series (E90).
If you have a newer BMW model with a different Key Fob design, read here on How To Replace Key Fob Battery BMW F30.
Battery can not be easily replaced on rechargeable key fobs. BMW rechargeable Key fob is not designed for battery replacement therefore requires cutting key shell to replace battery.
However, is possible to replace a rechargeable battery. Its time consuming as you will have to cut key shell in half and also needs a soldering tool for battery contacts.
How to Remove Key Fob Battery
Image above shows where BMW key fob battery cover is located. You can use a use a screwdriver to open battery cover or use own key fob blade. Press release button (blue circle) and remove key blade.
Insert key blade where red arrow in picture below and pry open key fob battery cover.
Remove old battery and replace it with a new one. Notice polarity of battery prior to removal. Install key fob battery with positive (+) side up.
BMW key fob battery model is CR 2032.
How to Replace BMW Key Fob Battery: Install battery cover by pressing it in, put key blade back in place. No need for programming BMW key fob after battery replacement, it should work right away.
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