I fixed my key fob remote central locking
I had the usual problem that the remote central locking did not work from the key fob with my X5. I decided to carry out surgery to fix the problem. I took a small craft knife and carefully cut all around the key fob to seperate the two halves. I had a spare battery prepared and ready to install but on further inspection I found that one of the battery terminals had sheared from the small ciruit board inside the key fob. I got the electrical tester out and tested the voltage of the new cell at 3.3v I then tested the voltage of the cell in my key fob and this too read 3.3v. I decided to try and re-solder the sheared terminal back on to the circuit board. I found a small piece of wire to use as a bridge and soldered it in place. Hey presto the remote central locking now works absolutely fine from the key fob. I carefully superglued the two halves of the key fob back together and now it is as good as new.
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