Good points. Thank you!
In 2021 I had a battery go on a 2017 BMW X5 key fob and figured out what to do using the internet. The dealer replaced the batteries in both key fobs at no charge. The parts guy told me he could not predict battery life as it depends on how long they had been sitting on his shelf.
My suggestion is get new batteries in both fobs.
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"No one is more hated than he who speaks the truth." Plato
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