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Key Fob doesnt lock/unlock Doors or Trunk Key Fob doesnt lock/unlock Doors or Trunk
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Old 04-11-2019, 06:21 AM
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Key Fob doesnt lock/unlock Doors or Trunk
How to change the battery in standard remote

Thank you!
Last edited by Algold415; 12-28-2019 at 06:56 PM.
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Old 04-11-2019, 04:03 PM
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Hi,
Did you try locking/unlocking holding the key against tailgate glass just under the rear spoiler? Sometimes the diversity antenna (located under the upper plastic trim of the tailgate) loose reception range and need replacement. Happened to me few month ago.
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Old 04-11-2019, 07:07 PM
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I tried to click the key fob above the trunk hatch and nothing happened.
Last edited by Algold415; 12-28-2019 at 06:56 PM.
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Old 04-19-2019, 08:43 PM
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Quote:
Originally Posted by thib View Post
Hi,
Did you try locking/unlocking holding the key against tailgate glass just under the rear spoiler? Sometimes the diversity antenna (located under the upper plastic trim of the tailgate) loose reception range and need replacement. Happened to me few month ago.
Hey Thib, if I remove the diversity antenna from a working vehicle,(to test out in my car) will it need to be re-programmed once I place it back in the original (donor) vehicle? Does the battery need to be disconnected during the removal? Or is it just a 'plug&play' with no need to re-program or battery disconnect? Thanks!
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Old 04-11-2019, 07:29 PM
ard ard is offline
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Why would you not insist on two working keys before paying one penny? Especially knowing it's a 400-600 dance.

If you have a proper cable and BMW software, you may be able to do some troubleshooting ....
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Old 04-11-2019, 08:10 PM
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I was still able to get the car to lock/unlock with the key against the diversity antenna.
I remember a post were the diversity antenna was KO and the key was not working at all.

It is pretty easy to change, you have to open the tailgate and unclip the upper trim of the tailgate. 2x Torx bolt old the module and you just have to unplug it and plug the new one.

I was in the same boat, not sure if it was the key or the module so went to the wrecker and ask him if I could test the module he had on the carpark to be sure it was ok, took me 5min max to swap.

Just make sure the frequency are the same, mine was 315MHZ. The frequency is written on the module.

http://2009.bmwfans.info/parts/catal...nna_diversity/
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Old 04-11-2019, 08:17 PM
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Trim to remove is part n1 in the diagram https://www.realoem.com/bmw/enUS/sho...diagId=51_6405
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Old 04-11-2019, 09:27 PM
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I unclipped the plastic trims and located the diversity antenna. Put the key fob right on it, pressed the buttons while moving the fob around, but still nothing.
Last edited by Algold415; 12-28-2019 at 06:57 PM.
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Old 04-12-2019, 01:18 AM
ard ard is offline
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Quote:
Originally Posted by Algold415 View Post
I guess my next step is to locate another antenna module, swap out and see if that fixes the issue.

glad you got it figured out. report back.



Any plans for a second key?
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Old 04-12-2019, 07:06 AM
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regarding the radio, in my case FM AM were working fine, just the key reception being the issue
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