Removing ECU Harness Through Firewall

[Pete_89T2]

Originally Posted by djmtsu

You just wiggle it through from the outside.

There are 2 plugs under there that are NOT plugged into the ECU though....make sure they are unplugged!

^What he said, those 2 plugs that don't plug into the ECU are a PITA, especially if you didn't know they are there to begin with. I replaced my old crispy stock harness with a brand new one, so I was expecting those plugs, but it's still not easy to get to and physically unplug those suckers without little monkey hands. One tip that helped me out was I removed the glove box (door + insides, easy to do), and the lower dash trim where the dash speaker is. This was on an S5.