Hello.

Looks like I need to replace my whole engine bay wiring harness,
because they don't sell the wires individually (I need to replace
my MAFS wiring)...

Two questions:

1) How do I obtain the model number?
2) How difficult do you think replacing the wiring is?

Any other help is greatly appreciated!

Thanks!
FLO_BOY

 

1 - just tell them what year you have and model.
2 - i've done plenty of engine swaps and other fun things, but honestly i dont think i would attempt this. your probably looking at 3k with parts and labor alone.
I would try a junk yard or a online car part place, have them cut the wire you need, and wire it into your harness.