Can you tell me the engine codes from both engines.
Also the size of the engine and whether it is a turbo or not?
Also, the 9-3 model changed in 2002. Are both the same version or are you trying to fit early engine into newer body style?
its a newer body style and there both 9-3 turbos i havnt brought the other one yet
The newer body style is not compatible with the older engine, gearbox, wiring or control units.
The later platform is more compatible with the Vauxhall Vectra and uses Vauxhall running gear.
Not saying it cant be done, but amount of work would be considerable.
Do you need further assistance with this.
If not, then please rate my assistance so that I get paid.