Is it tough to replace the rear struts on a 1999 Hyundai Accent?

Yes, and potentially dangerous. Better to have a shop do it if you're not familiar with cars (you'll need a spring compressor if just replacing the shock, but an impact wrench is a must whether your replacing the shock or the whole strut). However, the service manuals for Hyundai can be found on line at Click on the "shop" tab, choose your car and find the information you are looking for. More information can be found at: