I have a 97 audi 2.8 a4 fwd Drivers side seat is power but not passenger.
Now I just found a 99 a4 quatro with all power seats for awesome price and in mint condition. First will they bolt right up to my car and just plug and play for driver side? Second how would I go about with the passenger seat to make it work? Thanks so much also would be getting the backs do they just bolt in?

 

You might get lucky and find a plug harness for your passengers seat hidden under the seat. As long as they are the same number/letter designation, they will probably be a direct swap.