How to fix Audi A6 A7 A8 Q7 48V alternator step by step

[@alexanderpanov2483]

Is an IGBT transistor required or can mosfets be used?

[@mysupercarexpert]

We only use IGBT, these alternators are subject to high currents and temperatures. Even the aftermarket IGBTs we use, which are quite good, will last about 10-20k km in average after repair.

[@Staspressonov]

Thanks for the instruction! It is very important to flash the generator to the latest software.

[@mysupercarexpert]

There hasn't been much activity for these software-wise! Usually you don't need to bother with software, as issue is 99% of times hardware. You could still reprogram them with a VVDI Prog. Processor is SPC5644B

[@Staspressonov]

It is my understanding that these alternators fail due to overheating by over current. The new firmware reduces the amount of current

[@abdelghanihajji2012]

Thank you very much

[@ШуруйМандруй]

@@Staspressonov hi, how to update the firmware, do i need to visit Audi service?

[@Staspressonov]

@@ШуруйМандруй , hi! I use software ODIS with adapter vas5054.

[@thetomster7625]

I do design work in this field and can tell you: with the amount of thought that goes into thermal management and voltage insulation, this repair here will not fit any parts of the necessary specs ad thermal models that are used to control it - so thermal hazard or breaking of insulation barriers has a very high possibility here... I would not recoment this - cars are no playground I'm all up for repairing and repurposing electronics - we need to reduce waste -, but this here is a burning car waiting to happen

[@ШуруйМандруй]

Hi thank you so much for the instruction. Where can I order new board for replacement, just like that blue you used on the video?

[@mysupercarexpert]

Our website: mysupercarexpert.com/products/audi-a6-a7-a8-s8-d5-2017-2023-48v-alternator-4n0903028p-igbt-repair-spares-aftermarket?_pos=1&_psq=IGBT&_ss=e&_v=1.0

[@nyrangerfan100]

cool that you were able to do this, but very hacky, and way too much work and risk for problems IMO.

[@zaprodk]

Wayyyyyy too much thermal paste!

[@abdelghanihajji2012]

Hi