Hi, I'm looking at swapping my standard MY00 Y7 AE802 ECU for a E3 AE800 one,
Question is, Do i have to get the matching immobiliser unit, Key and transponder unit or will the one already in my car work with the new ECU by just plugging it in, Thanks in advance.

 

Why you after an 800 ecu, the 801 is the better ecu

 

my99/00 ecu's are plug and play..

 

I thought the 800/801's were pretty much the same,
So no need for the paired immob unit from the same car as the new ECU, Great, Cheers for the replys.

 

800 runs very rich, 801 is better with advanced timing, 802 is worst of all from a tuning point of view but yeah all 3 are interchangeable.