How many miles has the car done? Springs will wear and loose their strength over time. Usually it will be the drivers side to show signs of dropping first as that side of the car gets the most use.
It has 22,000 miles on it right now ... I just put 2k of those miles on in the last week.
It has Eibach Springs installed ... they have been on the car for the last 6 years and 6k miles.
The car was sitting on an uneven parking lot space ... and the drivers side REAR looked to be sagging again (about 1/4" tire gap difference). I noticed the drivers side REAR tire has made very slight contact too ( hit MAJOR dips and bumps through those 2k highway miles I just did ). Maybe the shocks need to be replaced in the back?
The shocks are blue ( I am guessing stock KONIs?) ... thats all I can see right now ... what brands are recommended for lowered cars? Im familiar with Bilstein, do they make a set for us?
The Eibach kit seems to lower the rear 1" and front .6" from what I found while searching ---