Key sync for central locking

[RS4_Dan]

I can’t believe I am even asking - but having failed to get any of the online key sync procedures to work…

After a recent battery replacement I have been unable to get the remote lock / unlock to work on the key fob (I only have one key fob)

I could always do it first time on my old b7 rs4

Can someone help and put me out of my misery with the correct sync procedure?

Thanks in advance.

[RS4_Dan]

Ok. So the car isn’t seeing the signal from the remote, even with the new battery (2nd new battery). So recommended a new key.

But just found out that being a Japanese import the remote locking frequency is 315mhz. Whilst the uk is meant to be 433 mhz I understand from searching online that the rs6 is 868mhz.

Can anyone confirm the part number of their key? I have the Kessy option.

Secondly does anyone know where the remote locking receiver is? I can’t believe it is included in the comfort control unit.

So what key pet numbers do you have?

[Jim Haseltine]

Part number visible on my key unit body is 4F0837220AK. And it's marked 868MHz. I know there are a number of antenna around the car but as for the receiver I think that its mounted on inside the car on the engine bulk head just behind the glove box. But I wouldn't bet my life on that - or put money on it either.

[RS4_Dan]

Thanks Jim.

Starting to understand why the garage couldn’t fix the remote locking!

[Jim Haseltine]

The circuit board in one of my keys is marked 233.359.011 G

[RS4_Dan]

Thanks Jim

Am going to check mine once I finish work!

[RS4_Dan]

Yes same part number on the board.

[RS4_Dan]

Anyone any thoughts on what I need to do to convert 315mhz to 868mhz? Is it just the antenna (wherever that is) or the comfort unit or the door control units?

A new key is going to be costly if I get the wrong version.