Sagging suspension can be a result of air suspension struts and/or drier leaking air. These type of air leaks can lead to failure of the air suspension compressor.Google+
Car Problem Reports
Lincoln Town Car Compressor Failure Due to Air Leaks From Air Suspension Struts and Drier
Lincoln Town Car Problem
Average Mileage: 135,984 mi (51,500 mi - 226,985 mi)
Visitor, 2004 Lincoln Town Car, 51,500 mi
retrofitted with regular struts
Visitor, 1993 Lincoln Town Car, 180,000 mi
my air bags were cracking and leaking air so i replaced them with coil springs..
Visitor, 1997 Lincoln Town Car, 226,985 mi
Passanger side goes down when parked and air compressor runs all the time.
The ais suspension light is on, the rear is sagging, and I can't afford a big repair.
Visitor, 2001 Lincoln Town Car
pump ran all the time ,now it doesn'nt
Visitor, 2004 Lincoln Town Car, 100,000 mi
I was driving my 04 and all of a sudden it went to the ground my rear end wtf.
Visitor, 1996 Lincoln Town Car, 159,000 mi
air leak in the air bag compressor comes on and off dash light comes on
I had to get my air bag suspension system replaced.
Visitor, 2004 Lincoln Town Car, 105,000 mi
Passenger front sages when engine is shut off. While driving, the level is consistent with the other three corners. Local Ford dealer quoted $1900 to repair air ride suspension system. That seems outrageous to repair only one corner.
Visitor, 2004 Lincoln Town Car, 95,000 mi