ribeye

From what I understand, the fob has two types of signal, one like your garage door opener and one like your credit card needs contact or very close proximity. One needs power, the other does not. This way even if you fob was completely dead, you could still start your car.

raaizin

Ok thanks for the clarification

OFDPOS

Have them scan and then have them perform "key adaption to vehicle".
No guarantee , that's what they did to our 2018 Q5 several times before they bought it back.
And now that's what they have done to our 2021 Q5 at least twice so far, but we haven't been driving it since we got it back from last service 3 weeks ago.

Wife will be going back to work tomorrow , so she'll be back to driving it daily , we'll see how long till it happens again.

raaizin

OFDPOS,

Got car back yesterday they said they couldnt duplicate naturally. Today I have 4 different videos of it happening. Good thing for Iphones. Back to dealer tomorrow! Strange that there arent more posts about this issue! I purchased new but dont think I qualify as a lemon as car is 3 years old. How old was yours when they bought it back and how much did they give you trade in valu or purchase price? PM me PLEASE if you dont want to put it out there

ribeye

Do you think it could be an environmental issue? I don't mean weather, but something else. I know when I had my Acura, if I kept the key fob in the same pocket as my cell phone, I could not unlock my doors. It took me a while to figure it out and I solved the problem by simply keeping my fob and phone in different pockets.
Just a thought.

Tesla1856

1. Good indication there is nothing physically broken. That is actually good.

2. Because most owners just replace with high-quality CR2032 Battery (every 9 months) and get to their lives. Because #1 happened, only other possibility is a bad Fob (with a cracked motherboard and intermittent short/open). However, use of your 2nd-Driver Fob would rule that out.

Tesla1856

Yeah, only problem we have had recently is wife said her FOB wasn't being detected so well lately. Turns-out she had it in her brand new (NFC and credit-card blocking) purse.

I explained to her what the problem was and her first response was "But this is a Audi Fob, not a credit-card or phone". Pretty interesting how few adults understand how wireless (used to be called radios) work.

I picked my screen-name for a reason, and it has nothing to do with the other guy who took the name for his company that builds cars and spaceships.

raaizin

I have the key in my hand I manually lock and unlock. Old habits never die. . I was thinking enviromental. Nothing really changed on our block and houses are pretty well spaced.I have had car 3 1/2 years and not experienced this ever until now

Tesla1856

To be clear ... I'm only still trying to help you because you said Audi dealer said it was working fine for them (also that whole towing ordeal). I would hate to be in this situation. Please read my questions carefully a couple of times before you answer.

Yes, holding it in your hand is fine. As far as EMF interference ... outside on the drive-way is best/cleanest. EMF would be coming from things like your house, other cars, stuff like that.

a. Do you have 2 key-fobs for this vehicle? If so, are they the original ones that came with the vehicle when it was new?

b. Have you installed brand new Duracell or Energizer CR2032 batteries in both key fobs?

c. Are you testing both fobs, and keeping track of which one sometimes does not work.

raaizin

Thanks! Any help would be appreciated! We have 3 other cars. All bone stock 2017 VW Jetta SE, 2014 porsche 911, 2021 Cayman S. Both porsches are garaged . VW and Audi in driveway. I have used remote as close as 2ft away pressing the remote manually
a)I have the two key fobs which I received when I purchased the car new
b)I installed new Energizer CR2032 batteries,Dealer said they replaced key FOB batteries but I didnt check if they did. I am sure they did but just giving all info I am 100% certain.
c)I have tried both and both exhibit this issue.