Replaced pads, rotors, and inner tie rod (pass side only, clunky noise on that side) to no avail. Any suggestions? Under light to moderate braking, it isnt noticeable. During hard braking, the car tries to change lanes on me. I am pretty well at my wits end. I HATE taking it to a shop, but it looks like thats my only remaining option. Any help would be tremendously appreciated.

 

Have you bled the brakes? There might be air in your brake line or you might need new brake lines ( though I doubt this considering the car isn't too old ). Did the caliper piston seal look good when you replaced the brake pads? Could be that the caliper piston is getting stuck.