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BMW SOS Battery Removal Method?

2 Answers

Joshua

07/25/25 11:17am

Open the BMW car door, remove and lower the interior headliner to locate the telephone module directly beneath it. Unclip the battery compartment cover to inspect the overall condition of the SOS battery and check for any damage. Carefully remove the battery, purchase a matching new battery from an auto shop, replace it with the new one, reconnect the in-car devices, and it will function normally. If the battery shows no damage and the SOS battery surface appears intact, drive the car to a repair shop and have it handled by professionals.

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Barry

08/11/25 7:58pm

I've previously dealt with removing the BMW SOS backup battery, which is typically designed for the emergency call system and is hidden under the trim panel on the left side of the trunk. Before removal, always ensure the vehicle is turned off and the key is removed to avoid false alarms from the system. Use a plastic pry tool to carefully pop open the trim cover—it's secured by about two or three clips. Then, you'll see a small black box; first, disconnect the connector plug by gently pushing the latch and pulling it out. Next, unscrew the screws on the box and remove the old battery. The whole process takes about 10 minutes, but be especially careful not to break any wires or damage the interior, or you'll need additional repairs. If you plan to do it yourself, I recommend following a video tutorial, like those on BMW repair channels on YouTube—they can be a big help. If the system warning light comes on after removal, you might need to visit a professional shop to reset it with a diagnostic tool. The battery usually lasts about 5 years, so it's time to replace it when it feels less responsive. If you're confident, it's quite simple, but if you're inexperienced, it's best to bring a toolkit to avoid mistakes.

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