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How to replace the battery of the BMW 3 Series E46 key

Model: BMW Serie 3 E46 - Years 1998-2006
Part: Key

In this video, we can see how it is commonly believed that the key of the BMW 3 Series E 46 is not removable and must be replaced, with a significant expense. In fact, the YouTuber showed us some more or less clumsy attempts made with other remotes, which still somehow work. Now he has refined the technique and shows us how to do it. With a sharp blade, we separate the two halves of the remote's body, and it must be carefully cut all around, in order to separate the two halves, but without cutting too deep to avoid the risk of damaging the circuits. Then we gently lift the circuit with the battery from the body. The battery is held by a kind of metal spring that is soldered on the opposite side; we must melt the solder, replace the battery, and then solder the spring back: then we reassemble the circuit in the body and glue the two parts back together.

Posted on 16 January 2025 by ScegliAuto

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