Hi everyone,

My car is Audi A3 8V 1.8T Quattro and currently in the process of replacing its failed DQ250 with another used DQ250.
Original tranny is PPP 0D9300011L (mech 02E927770AN) SW 4029 HW H52 has faulty mech unit (solenoids, pressure sensors, fluid leaks inside mech - all common problems). The new tranny I have sourced from another my VAG car, Skoda Superb 3V 206TSI 4x4, where I installed DQ381.
New tranny is SGA 0D9300014Q (mech 02E927770AS) SW 5007 HW H54.

I have managed to perform a full read of EEPROM and flash from both my trannies but now I'm stuck with immo data transfer from original to donor.
I know there are immo off solutions for DQ250 but I consider this as my last option as I'm eager to have a fully functional immo in my car. I'm also aware that there are tools to edit EEPROM. I only know AARK Commander and although this is a great tool but their cheapest 6mnth subscription is still too expensive for me for 1 time job.

I tried to analyze the dumps by myself but could not find anything except VIN. No power class, no MAC no CS... I suspect they are stored encrypted but what is used as encryption keys then? Is it a similar approach that used in ECUs where MCUID is used to encrypt immo data or is it something else?

I will be grateful for any help with this. I'm keen to get some understanding on how to do this but suspect not many people would like to share their knowledge of this kind. So will appreciate if someone shares a cheaper tool to edit DQ250 EEPROM or edits it for me. Both ori and donor dumps are attached

Cheers

Because I'm swapping the entire trannies - not just mech units. And afaik gear ratios in PPP and SGA are different. As a result, if I flash SGA tranny with PPP dump it will work incorrectly and will be throwing errors for gear ratios, won't it?

Copy all data to new mechatronic and write FRF which is correct for this gearbox ratio, or write this FRF before to your old mechatronic and copy all data to new mechatronic. But you can only write FRF "via OBD" if tcu is conneted to your car because of immo.

It may be easy for you but I'm not familiar with maps and parameters in gearbox flash so this way seems no easier to me.

I have bricked a plenty of control modules in my life, accidentally or on purpose. Personally for me moving eeprom dump from one DQ250 MQB mech to another without any modifications and not touching flash at all sounds like a clear and direct way to brick it. Or at least make unusable and requiring a restore from backup. And before doing some sketchy things I decided to ask here first if someone else has already tried to do this before.

I'd rather create a "How do I do it?" post than "Bricked my mechatronic! Need help to recover it!" post, don't you find this more appropriate? If I had a "test" unit to play with I'd definitely try this before bothering you and others with my newbie post.

That is a good idea, thank you!
When I first got the car I checked for new firmwares on flashdated disks and there was no FRF for 0D9300014Q at that time. Luckily for me it was released in Jan 2024 so as of now I'm able to obtain original FRF for a new mech. Worth trying!

Yes, you are completely wrong. SBOOT never boots ASW so immo shit is completely irrelevant.