2007 Toyota Camry is making a loud noise when driving on street or highway
Can you describe the noise a little better?
Better yet, can you record it with your phone so you can play it for the mechanic(s)? I did that years ago with a cassette recorder and it helped them diagnose the problem right away. If possible, if you want help here, if you can record it, you can upload it free to Soundcloud and post a link in this thread.