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Disassembling the Key Fob for Battery Replacement

Model: BMW Serie 5 E39 - Years 1995-2003
Part: Key

Every key fob used for locking and unlocking the doors contains a small battery that powers the electronic circuit of the transmitter. When this battery runs out, it becomes impossible to open the doors remotely. Fortunately, you can access the vehicle using the mechanical key. Replacing the battery is simple; use a small tool to separate the plastic cover that hides two screws, remove the screws, then open the two plastic halves and take out the battery. Replace the battery with a new one that has the same specifications. These batteries can be found at any supermarket.

Updated on 4 February 2026 by ScegliAuto

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