It would have cost me 200 dollar for a new key, now I changed it myself for only 5 dollar…
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Battery: bought on ebay for 5 dollar. Search for: Panasonic 2020 with legs or BMW key battery
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 / how to change battery / E90 key fob DIY')){kind=link}
You should prove your fob works!!!
Thank you very much for the video!
My kee vap did not work before replacing the battery and it did not work after . Any Help
Does the key have to be reprogrammed after battery change? I only have one key on me so I'm hesitant to do this.
BRO i did the thing as you showed but key functions good but it can't go into the whole so i can't start my key the key anymore because it doesnt fit anymore…please you have advice to help..?
Battery number plz
Thank you for this helpful video. It gave me the confidence to do my own remote fob. The new remote fobs are £380 from BMW !!! but a battery from China on ebay cost £1.89 free delivery 😛
which one can i buy ? 315mhz, 433mhz is it same? i use 320i e90
Does anybody know my solution? I bought a new key transmitter at the dealership and it doesn’t work. The old and new don’t work. The car starts and runs with the key. The central locking system works fine. All Door lock actuators work. But the remote won’t open the doors. The dealer thinks it could be an $800 antenna job.
Those are RECHARGEABLE batteries ! Don’t put a non-rechargeable one into it, as it may destroy the remote antenna or overheating the battery. You can find spare rechargeable accu similar to the original one on eBay !