How to Replace the Battery in an Older BMW Key?

1 Answers
Harrison
07/30/25 7:46am
The method to replace the battery in an older BMW key is as follows: 1. Before replacement, first understand the battery model of the key and purchase a new battery according to the specified model; 2. Remove the hidden mechanical key from the remote; 3. With the key back cover facing upwards, insert the mechanical key into the position where it was just pulled out, and gently pry to open the back cover; 4. Take out the old battery and replace it with a new one, ensuring the battery's positive and negative poles are not reversed, then snap the back cover back on. Taking the 2005 BMW model as an example: its dimensions are 5179mm in length, 1902mm in width, and 1484mm in height, with a wheelbase of 3128mm and a fuel tank capacity of 88L.
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