Depending on which harness you use, its not too difficult. I used the ECS piece and although it took most of the day the job itself was quite easy, just time consuming. The ECS harness is not a direct fit so I had to splice into 4 wires.
There is a coil pack harness available for the MKIV GTI, Jetta and TT but unfortunately not for the B5 1.8T. You may be able to use the MKIV harness and cut and splice to repair what you need. I do have this harness in stock. The part number is 1J0971658L and the price is $55.72.
so this is what the stealership tells me, guess im gonna have to do some project
wiring harness 01 1.8t
brand new front and back rotors (quattro)