Contour Enthusiasts Group Archives Forums General General tail light bulb factory mix-up???

The answer is such...

The pre-98 models used round bulbs while the post-98 use wedge -style. My '98 Mystique was caught in the middle. It's production date is April 1997 and still uses the round bulbs even though it's a 1998 model. I just recently found out because I needed to replace one of the sockets since water that was getting into the housing basicly cooked the original.

I'm guessing that somewhere along the history of your car, that taillight housing was replaced along with the socket. What year is your car?