Remote Lock/Unlcock not working so well.

[YelloSno80]

I replaced the battery in my 2007 A3 Key Fob, but I am still having sensitivity issues with my remote entry and locking system on the car.

Is there a sensor that I can replace or check? Where is it located? What is it even called? Any help is appreciated, thanks. - YelloSno

[Dad A3]

I am having the same problem with the 2012. Dealer says there's nothing wrong, because there's no code. The device/sensor/chirper? is located in the right rear wheel well.
I don't know what it's called, I shamed him into replacing it by telling him if it didn't fix it I'd pay.
Now I'm having a new issue, when I do the remote lock all windows raise except the driver side rear. Did the VAG-COM seat belt chime and windows up and down with the FOB last summer.

[YelloSno80]

this is nuts. Sometimes my car will lock, open and sometimes it wont. The key also unlocked the hatch, but that can be selective. I called ECS tuning this weekend to see if they sell anything replacement sensors or whatnot, but they didn't even know if there was anything available.

I will check my right rear wheel well, strange place for a sensor but I will see what I can find. I never could figure out how all the windows would slide up/down with the key fob, then again I have an older 2007 model.

Thanks for the reply... good luck with troubleshooting.

[alecwoj]

I had this issue as well. When I replaced the battery however, the doors would lock/unlock again. EXCEPT, the driver rear door does not want to lock. Is there a latch, or something inside the door that could be the issue there? Or is it more than likely an electrical issue?

[Dad A3]

none that I'm aware of.

[bhyrman]

... I never could figure out how all the windows would slide up/down with the key fob, then again I have an older 2007 model.

YellowSno80,

all windows up/down can be coded with VAG-COM. Then you can lower all windows with your FOB by pressing and holding the unlock button, windows up with the lock button.