Question about 2001 BMW 5 Series

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My sparekey will remotely open the doors and light up the dash, but will not start the car. There are no problems starting the car with my main key. We have wittled down the problem to the one key. As it still open the doors I assume there is still a charge in it, could it be that the key has lost it's coding? Unfortunately I did not get a manual as I bought my car and so far have not had any reason toorder one, please help!!!

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  • yadayada
    yadayada Aug 06, 2010

    the FOB is a separate part of the key, so it can work while the key doesn't. GET A MANUAL!

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The key has a coded magnet inbuilt and it has possibly lost its primary code(long story)so you will need to take all the keys to a dealer and have them all recoded.(change the remote batteries at the same time)droping or leaving keys next to the tv/microwave are the most common causes.

Posted on Aug 06, 2010

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