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I'm having an issue with my key fob: after replacing battery in the key fob (CR2032), it only lasts about 3 weeks before dying. It won't trigger ignition or dash and therefore you can't start it. I'm wondering if anyone else has had this issue. I store the fob inside, away from the bike when not using. I have talked to BMW dealer about this and they are going to submit a warranty claim to see what BMW factory has to say. It seems like something has gone awry in the fob electronics where it is always sending out a signal to try to connect to my bike and therefore running down the battery. They are supposed to last 1-2 years.
 

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Mine lasted about one year and 8 months.....and even though the low key warning came up I still was lazy and used for another month. Even with that low battery warning everything worked well.
How long does it last even when the warning shows up i dont know but one month has been tested :)
 

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I had to replace mine at about 9 months (from new), and just the other day I received another warning about it, which makes this one about 4 months. This last battery was a no-name brand, so I'm putting in a name brand one in this time and we'll see how long it lasts. I have had concerns about this myself, and like the OP, don't store the fob anywhere near the bike.
 

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I still have the OEM battery in my '16 GSA but will proactively replace it this year.
 

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Mine drained the battery repeatedly within a few days even though the fob was stored in the house about 100' from the bike. My dealer replaced it under warranty and I've not had a problem since.
 

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Just replaced mine after 9 months and within a week I got the 50% life warning on the dash. I keep batteries with me so I will see if it's a fob problem or a false warning.
 

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My understanding that even with a dead battery, the fob will still work if you use it as you would the plastic emergency key. Assume this is true but never tried it.
 

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My 2017 1200GS over 42,000 kms in 20 months never had an issue with my key battery.
With the 1250GS i started getting a warning on the TFT screen that 50% of the battery remained after about 7 months and 16,000 kms.
15,000 kms later i rarely get the battery warning and when i do it still shows 50%. FIIK what's going on. Another BMW idiosyncrasy maybe.
 
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