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A4 (B6) Key Fob Failure


Soapsuds
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Hi all - have tried searching, but cannot find an answer!

This evening when i got home my A4 wouldnt lock - it has been working just fine recently with excellent range etc, so thought it was strange. Anyway, i took it apart to find the battery to replace, but NO BATTERY!!!

Strange design! Does anyone know if there is a small replaceable battery hidden in the fob and if so how can i replace it.

I am running on the spare fob at present, but this will also go soon no doubt!

Help me avoid a stealer trip! Thanks in advance! 169144-ok.gif

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If you press the unlock/lock keys too many times when out of range, it will un-sync the key and the car.

There is a procedure to teach it again, but I found the buttons on my fobs were getting knocked too many times.

Either that or it's the battery. Try holding the fob to your chin and pressing it. If the battery is weak, this trick helps.

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Here's the procedure for the recoding. It's for an A8, but it should be the same.

To increase the range of the fob there's apparently a way to 're-route' the antenna. Check the same site - audipages.com - IIRC there's a how-to on there. Again for the 8, but it should point you in the right direction.

Tip: reprogram your central locking device to 'beep when lock' (with VAG-COM). You'll always be sure it locks w/o having to watch the blinkers. 169144-ok.gif

Note: if your car refuses to lock or set the alarm there may be one door/lid ajar. I've experienced this when GF didn't properly close the boot. Hardly visible, but the car refused to set the alarm. W/o the 'beep' set to confirm this it's not that hard to miss, resulting in an un-armed or even unlocked car.

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Hi I am a newbie here so bear with me.

I have a 1997 R Avant. The key fobs have had the batteries tested and they are working fine. I have tried taking the car to Audi fro reprogramming and this failed.

I have tried all the recoding procedures and the lights do not flash or beep. I have seen about reseating a fuse but I do not have a fuse diagram to be able to do this.

Audi have quoted the following

WE NEED TO SPEND 1.0 TO FIND THE FAULT. THE COST OF THAT WILL BE £105.75 INC.

IT IS POSSIBLE IT MAY NEED A CENTRAL LOCKING PUMP. LABOUR = £180.00 + VAT

PART = £290.36 + VAT

Does this make sense given the car locks from central locking manually ? Can anyone help

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Hi Newauid. Welcome to TSN 169144-ok.gif

It's unlikely that you need a new pump, if you can lock the entire car with the key manually in the door.

Testing a battery does not really mean they are good batteries. It simply means the voltage may be at 3v or not.

I would suggest getting a new battery regardless first. At the worst case scenario, this isn't an expensive test.

Have you found the re-coding procedure for your car, or Audi's in general?

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I have tried with both keys and to the letter - there is no beep or horn whatsoever or sign of life. I have also done the reset after a new battery one as well and followed the manual.

when the tested the abtteries they put them in a machine - but could not see anything else - sorry

I am so frustrated

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