Hey chido, my name is Vic I'm new to the site. Ive been talking to 9450erik and he recommends I ask you. About a week ago I swapped my 99 Honda accord ex over to 5 speed. I was wondering if I could use the 2001 Honda accord lx ecu I got with all the other parts for my swap? It's the ecu that went with my manual trans. And why cant I use the 99 auto ecu that was originally in my car?