2005 Pontiac Sunfire speed sensor help?

[Eliza.]

A few years ago, someone used my car to jump start theirs. They shorted something out, and I have the CHECK ENGINE light, the ABS light, and the TRACTION CTRL OFF lights lit on my dash. I went to the Pontiac dealer and what I remember being told was it was a Wheel Speed Sensor that the wiring had melted and that would need to be replaced. They wanted to charge me $350 for that.

I would like to have my boyfriend (who went to tech school for auto mechanics) repair this. My question is what part to order? Do I need the sensor itself and also some kind of wiring harness? Where should I get this?

Thanks!