2000 Volkswagen Jetta Front end noise

Whenever the car hits any bumps, there is a rattle sound coming from the front suspension area. The car drives and handles fine, even over bumps. The noise sounds like something metal loose and comes from both sides of the front end. It has been looked at on both a 4 post lift and 2 post lift, and nothing loose can be found. It is especially noticable at slower speeds and over any bumps or rough road. Any ideas what it could be? I was thinking strut mounts, but have no way to comfirm it without taking the car apart.