Slow down a second there, Tex.
All-wheel-drive cars indeed had the 205/50R
17x7" wheel & tire fitment as original equipment. However, the AWD cars can also accept the 225/45R
17x8" fitment that was OE on some RWD variants, for a modest bump in handling performance. When I had my 325xi I upgraded to that RWD size for my summer wheels, keeping the OE set for winter (narrower tires are better in snow). Your car's previous owner may have done the same.
Notice, however, that the
wheels are wider (the dimensions I boldfaced above), not just the tires. If the previous owner upgraded to the wider wheels, you should
not try to fit the original 205/50 tires on them--they will be a little stretched to fit. That could have a slight adverse effect on the ride quality and the tires' resistance to pothole impacts (very important here in NJ!). Conversely, if the car is still riding on its OE wheels, the slightly wider tires do no harm; you could replace them with either the 225/45 or the original 205/50 size as you see fit.
Before you buy tires, pull a wheel and check the size cast into the back side (usually on one of the spokes). It will be 7Jx17, 8Jx17 or similar. Let us know what you find.