Audi a3 2006 how to get the 7th bytes in all key lost?
You have 2 options
1 – perform all keys lost and xhorse change by itself the 7th byte
But you change original data.
A vvdi key tool plus does not need the 7 byte but when you do all the keys lost you will no longer be able to make dealer key anymore in that car because the 7 byte invented the tool read immo and from there create a key of dealer of which already brings the car much easier and faster
2- go to key learning inmo status
Check item dealer key you put the 7 from hex 00 to FF
( 256 possibilities take one hour )
When you see yes dealer you got it and var get original data
That if only have xhorse device.
Another way is to use autel with apb112 to sniff the 7 in one minute.
I use Autel IM508/IM608 and apb112 for this car. Read 7th byte from ignition switch.
Read ecu get 6th byte cs and sniff switch with apb112 and you get 7th byte.
Check instruction
http://blog.obdii365.com/2022/06/16/audi-a3-2204-2013-all-keys-lost-with-autel-im608-apb112/
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