How to Replace the Battery in a BMW New 5 Series Key?

1 Answers
NorahFitz
07/30/25 2:38am
BMW 5 Series key battery replacement steps are as follows: 1. Use a flat-head screwdriver to gently pry open the back cover of the key and remove it. Do not touch the circuit board or battery terminals. 2. Remove the old battery and insert the new battery into the slot. When installing the battery, ensure the positive side faces downward. When replacing the battery, make sure there is no dirt, grease, or other foreign matter on the electrode contacts. 3. Reattach the key's back cover. After installation, check that all buttons on the key function properly. 4. After replacing the battery, verify that all functions of the smart key are working correctly.
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