Was under my 03 X messin with the fog lights and noticed that my driver side sway bar link was missing. I hit the end of my friends driveway a little to fast a couple of days earlier and attributed it to that. When I went to price a new set at AutoZone they quoted me around $27.00 each. Called my buddie that works for NAPA and bought a SET for $6.00 plus tax. I just have one question, should I remove the other side first and then install both at the same time or replace the missing one and then install the passenger side. Might sound like a stupid question but I know I'll get the right answer here

Depending on if you are parked evenly, jacked up, have a PML/SL, etc, there may or may not be some tension on the front bar.

If there's tension on it, just even it out, so there's not.

Then, you can do the links in any order you want to, w/o having to fight the end on, etc.