Hi I have a 99-00 uk 2000 impreza, it’s been a project of mine and still is on going.
i was going through some of the parts I have.
I have 4 ECU’s a the original one is a Y7, I also have a E3 and a SP Sti 1001056110 and one that has no case but was told when I bought it it has a ECUtec licence on it.
i know all will fit but wanted to check about the circuit boards to make sure they are correct ECU’s
The Y7 original and the ECUtec one has A19-001 DS4 the E3 and the SP sti ECU board have A19-001 DS2 on them.
im assuming the Y7 and ECUtec ECU’s are the same ECU With DS4 boards but the question I need answering is, is the SP sti ECU correct to have the DS2 circuit board ? and no one has stopped the case on it at some point.
Is there a list of what circuit boards where used on what ECU’s
If your wondering why I have 4 I got the E4 first as I was told it would improve power then I got the SP because that would be even more power but since then I’ve changed a few parts so I have decided I would best go the ECUtec direction.

 

cant help you with the part numbers but your local ecutek dealer will be able to plugin and tell you which ones have a license or not on them, your mileage may vary but generally I wouldn't charge for doing this.