All said above is correct. I just did mine harmonic balancer @ 120k miles mark. Seems to pretty common problem for a car with that mileage. Before I got hands on the right part I was driving around for atleast 3 weeks so no problem there at all other than emberasment with a loud noise at the stops. I got mine HB from rockauto.com for just $110 US. Dealer quoted me $250 CDN for same part (Dorman). Make sure you order one for supercharged engine. Local store guy screwed up and got me non-supercharged at first I was so mad since it was special order and I had to wait a week just to find out that it is a wrong part!
Then make yourself a favour, rent a HB removal tool, makes it a lot easier. For some reason (my mistake or rockauto.com fault) I received a part for 93 when mine is 92. Didnt noticed a difference when installed but the car would not start! Removed HB once again, compared a parts and sure they are different. First the distance between grooved rings is larger thus one of the notched rings ended up outside of the crank sensor. I was lucky I didnt damaged sensor. Then nothces themself a different in size so and the distance between them. I had to swap the rings from old HB to a new one. That was a nightmare by itself since the old bolts holding those rings were completely stripped. Welding a 6 mm nut to each bolt then carefully unscrewing it did the job, but it was some precision welding involved. Glad I was doing it in a brother'* hydraulic shop with all the tools available. Not a sidewalk job I'll tell you. Took me 4 hours total when its actually 1-1.5 hour job. After that car started right up.