2003 E46 316i - Spare Key not starting the car

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  1. 2003 E46 316i - Spare Key not starting the car 
    #1
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    sl311's Car Details
    Model of Car:
    316
    Year of Manufacture:
    2003
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    Hi,

    I just bought a 2003 316 and one key lets me in, and lets me turn the ignition on, but doesn't start the car, wheras the other is fine.

    I assume the transponder that disables the imobiliser is not working in that key. As far as I can tell, reprogramming by holding down unlock and pressing lock 3 times only affects the remote unlocking mechanism, not the transponder/immobiliser mechanism.

    Is there any way of getting the immobiliser to accept this key ? Can I do it ? Can a garage do it ? Or do I need to get a new key from BMW for this ?

    Thanks for your help,
    Mark
     
     

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    #2
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    steve23002's Car Details
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    530i Sport
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    It does sound like the chip in the spare key has failed. The only way I know to deal with this is to return to BMW and get a new key and get them to program the system. Give them a call for a price, as I dont thinks its as expensive as people think.

    There is not much Info on this as manufactures are recluctant to give out details on there immobiliser systems...
     
     

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    #3
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    r101's Car Details
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    Could be that the spare key has been disabled. BMW dealer can check the key status using the GT1 and if necessary re-enable it. If you have to order a new key it is done to chassis number and only the remote locking needs coded.
     
     

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    AlfonsoX's Car Details
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    I thought I heard somewhere that the keys are hard programmed (can't be changed) by BMW for each car. When I enquired they said they cost £110 and are programmed and shipped from germany and you are only allowed 8 extras, after that its new locks and a new immobiliser.
     
     

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    #5
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    r101's Car Details
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    Quote Originally Posted by AlfonsoX View Post
    I thought I heard somewhere that the keys are hard programmed (can't be changed) by BMW for each car. When I enquired they said they cost £110 and are programmed and shipped from germany and you are only allowed 8 extras, after that its new locks and a new immobiliser.
    Essentially correct. Maximum of 10 keys and new keys come already programmed but it is possible to disable and then re enable a key. For example if you lose a key and are worried that someone might try to take your car you can ask a dealer to disable the lost key.
     
     

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    thegoodbadandugly's Car Details
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    Here is a quick way to check the key is faulty or disabled - helps when troubleshooting a non start fault as rules the key in or out straight away.
    Follow this correctly:
    Open the drivers window fully. Switch off the ignition and remove the key.
    Get out of the car and make sure the door is closed - you must open and close door.
    Lock the car with the remote control, not the door lock.
    The car will be locked and deadlocked. Check this by reaching in through the open window and pulling on the interior handle button to attempt to open the door.
    Now, insert the key into the ignition and turn on the ignition - do this through the open window with the car still locked.
    When the ignition is on, the interior door handle should now open the locked door, first pull lifting the lock button, second pull opening the door.
    Also, the alarm should not sound, although you may hear a quick beep as you turn the key.
    If the alarm sounds, or the door does not come out of deadlock, either the key is faulty or it has been de-activated at some point in its past.
    In rare cases if the key is ok then the immobiliser could be at fault.
    If you don't open and close the drivers door to start with then the deadlocking will not be achieved.
    Sad I am yes, but observant!
     
     

  9. The Following 2 Users Say Thank You to thegoodbadandugly For This Useful Post:

    AlfonsoX (03-09-2009),Eddiethknife (31-03-2012)


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