I have a 2001 A8L Quattro in beautiful condition with a blown engine as well as a 98 A8 Quattro 4.2 with body damage. I am looking to swap the engine and am just curious if I am going to run into any issues with the wiring harness, electrical components or ECU being a few year older car? The engine code for both vehicles is the same (ACK) but I am just curious if the newer ECU will be able to communicate with the older engine without issues. Any input is greatly appreciated.