The radio and speakers have all rotted away as expected. Just took the speakers out of a 90s Caddy, and got a custom radio wired in.
The back window leaks water into the rear lid. This is an issue I have yet to fix; I have epoxied the entire window inside and out to no avail. Not a major issue though.
Replaced glow plugs this winter; really helped for Indiana cold weather, since I had no access to plug in at Purdue University.
Leaks in the vacuum system used to have the vehicle running after I have taken keys out and walked away until I locked the vehicle, then it would turn off.
RPM gauge no longer works as well as some of the dash lights.
Cruise control is extremely annoying with lots of acceleration and deceleration in an effort to keep the desired speed.
Air went out too. But for $1000 car, it isn't that bad with the biggest sunroof ever.
Minor rust and the paint has worn away from being left for 5 years under a tree before I got it. A repaint would be in order if I can save up enough this summer.
Hood ornaments keep getting stolen off of it. No fix except to keep replacing it.