Hi Just a quick question. I have a 3.0 2001 E53. This morning I went to my car unlocked it, got what I needed then locked it again. Went back 10 mins later and tried to unlock it, nothing it was like the fob was completely dead. pressed and pressed all three buttons to no avail. Tried it again ten minutes later and works absolutely fine. opened and closed it a few times, started the car. Every seems good. Any ideas?

Many thanks in advance.

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2001 X5 3.0