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How to re-sync keys after charging flat battery??

Discuss the problems with your X5 (E53).
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mark_le_b
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How to re-sync keys after charging flat battery??

Post by mark_le_b » Sun Dec 15, 2013 10:54 am

Hi all

I had to remove my battery (E53 X5 3.0i) to charge it as it was flat.

All back in no problem and car starts etc., but neither key will now lock/unlock any of the doors/boot-lid

Can anybody advise the re-syncing procedure to get the keys to work correctly again?

Thanks

Mark

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JohnnyRob
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Re: How to re-sync keys after charging flat battery??

Post by JohnnyRob » Sun Dec 15, 2013 11:11 am

Not sure where I found this but it's within a word file I've saved for e53 hints & tips.  Hopefully it'll work -

1. Turn key to position 1 five times very quickly
2. Remove key
3. Hold unlock button then press lock button 3 times, release unlock button.
4. If you have another key do the same button pressing within 30 seconds
5. Turn on ignition to finalise.
2002 3.0d sport, Topasblau Metallic hellbeige 2 leder, coms pack - Nav, DSP, telephone and TV, voice control, Individual sunshade glazing, heated leather with lumber, footplates and auto Xenon lights & wipers.Image

mark_le_b
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Joined: Mon Nov 18, 2013 8:21 pm
Location: Jersey

Re: How to re-sync keys after charging flat battery??

Post by mark_le_b » Sun Dec 15, 2013 3:42 pm

Thanks, I will give that a try.

marksoldx5
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Re: How to re-sync keys after charging flat battery??

Post by marksoldx5 » Sun May 19, 2019 9:25 pm

Just worked for me, Fantastic :D

I had synced my keys without doing the ignition on and off 5 times. This did work, but then both keys lost sync again.

I had repaired one of my diamond shape keys, by using a rechargeable battery.
Ebay item: 252005632983 this one came with the contacts in the correct place for my E53 2002 car.

These cheaper ( Ebay no: 223501825291) ones had the contacts in the wrong place, so I had to faff around and take the metal contacts off the battery as well and after all that it didn't work. So do NOT bother with these, pay the extra and use the other ones.

Mark

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