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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > DIY Guides > KEYFOB



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      11-21-2023, 12:33 PM   #1
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KEYFOB

I have a 2008 E 91 I have just bought a new rechargeable battery and sold it on to the board, but the key will still not work in the central locking. It does however start the car is there a way to re-sync this?
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      11-21-2023, 02:54 PM   #2
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do you have another key working remotely to open the car ?
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      11-21-2023, 02:56 PM   #3
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Yes both keys start the car BUT neither keys will open or lock the door….

So I bought a battery and fob, and soldered the battery to the board now it does start the car BUT doesn’t lock it or open it
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      11-22-2023, 03:25 AM   #4
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then you need to check wiring in right grommet between rear glass and rear door
this is well known place where wires breaks and remote key module under spoiler stop to function (enable open and close car remotely)
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      11-26-2023, 01:00 AM   #5
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Ok… wires broken!! Thanks so much for that, once I replace the wires will it just work or will I need to resync the keys? And also could it have blown fuses?

Thank you so so so much!!!!! BMW were desperate to flog me a key!!!! You saved me a fortune
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      11-28-2023, 05:35 PM   #6
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you don't need to resync key if you will fix wiring
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      11-28-2023, 07:00 PM   #7
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Well I’m praying this will work, it’s booked in with an auto sparky later on in December THANK YOU SO MUCH for your advice
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      11-28-2023, 07:10 PM   #8
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You can lock the car manually still.
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      11-28-2023, 07:12 PM   #9
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Yea locks with the pop out key, and the fob is working to start the car, scanned with an rf scanner and buttons are firing signals
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