Howdy. I'm the owner of a '99 Chrysler Concorde LXi with a 3.2L, 180k miles on it. Had it for the last 100k but only found this site a few days ago while looking for information about tracking down a fuel leak (which turned out to be the typical crack-in-the-nylon below the throttle body).
It has the litany of what seem to be typical problems for this body style, including the door locks that sound like a flock of sick geese and the ATC display that doesn't.
The Concorde is somewhat of an oddball in the family. Honestly, I'm a Pontiac/GM guy. I also own a '95 Chevy Caprice 9C1 (ex cop car, with the LT1), a '97 Pontiac Grand Am (with a 3400 transplant in progress), and a 1980 Firebird that I've had since 1988 (senior year of high school). Even my daily driver Isuzu pickup has a GM-built V6 in it.