Just thought I would document all the things that I've had to repair on my 2003 DE.
First issue I had was the running gear. banana arms where knocking so replace those first. after running well for a bit the drop links wore out.
on the front and the back. the next thing to go was the ball joints, but the problem there was it had fouled the fixing in the front suspension knuckle.
so replace both of those as well as all four rotors, also replace bushings with red Polly bushings.
next was the rear drop links. after a month or so the clutch went so upgraded to light weight fly wheel. it drove well for a year. then oil pressure started to play up. so replace the valve covers. plus added a plenum spacer wile I was at it. it had a buddy exhaust on it and the baffles came loose. so replace it with a HKS cat back. She ran well for a bit but developed a clunk on the steering and had to replace the steering rack. oil pressure issues came back and at the same time, the timing chain started to rattle on start up, some where she was loosing oil pressure but had no leaks. any way, this led to big end bearing failure, pulled the engine and rebuilt with forged rods and Cosworth 11:1 pistons, king bearings. arp studs all round sent the whole rotating assembly off to get balanced. modified the block to fit a Gen 3 head gaskets. new timing kit and engine gasket rebuilt kit. added new exhaust manifolds. replace pilot bushing, and upgraded clutch pivot ball as it was squeaking. Both master and slave cylinders also broke so had to replace those. re installed the engine and took it for an MOT. She failed on corroded rear kidney braces. I set about replacing them. but when trying to remove them it became apparent that the chassis its self was corroded badly where the kidney braces (rear stays) are fixed. I had to drop the rear subframe and the tank. Cut all the rot on the chassis and ask @ZMANALEX if he could cut some sections out for me. I welded them in good and proper then coated the bottom with rust restorer and epoxied. Now was time to upgrade the ECU to a link G4X PNP. also added new wideband sensors with aem gauges on both banks. Its been a long road and a lot of hard work as i dont have a garage and do all the work on the road with a jack and axel stands. In my eyes its all been worth it i love how the car looks.
Its nothing special when it comes to Z but its mine.