I never got a part number from them. I just went to the parts dept and told them I needed the speed sensor that goes on top of the differential. I think it cost me around $31.00 after tax.

Oddly enough, they gave me the wrong part the first time around, so if you can pull the part out and use another car to get to the dealer, I'd take the old part with you. It's much harder for them to screw up if you have the actual part out of you car.

Good luck!