So, first time I am posting anything. That being said, wife's car is a 2013 XC70 T6 3.0L that we got when we were stationed in Germany under the military purchase program. It has over 200k miles on it. The wiring harness for the engine that connects up the fuel rail and ignition coil along with the headlamp wire loom have issues with the protective vinyl sleeve cracking. This is causing issues as one can imagine. Initial research seems to have provided me with a part number for the engine harness, 31343307, but I am not totally sure if this is correct or not. Looking at how it is setup, it seems that trying to rebuild the section that connects to the coils and injectors would be a royal PITA. I am sure replacing the harness will not be that much simpler but I would rather do that than try to replace each connector wire along the loom where there is a crack in the sleeve.

What I don't see is a separate harness for the headlamps. Same issues here with the harness cracking at the connections and along the loom. It looks like it is part of a larger harness assembly that goes up into the dash. So my question ultimately is whether the part number I have is correct for the engine harness and, has anyone tackled doing repairs on headlamp connections? If anyone has recommendations on best place to get new wiring harnesses it would be appreciated as well.