So I’m replacing the rear brakes on my 01 volvo s40 and on of my calipers is bad so I got a new one, i get it on and everything and It was driving good for a few days or so and then I lost my brake’s because my mounting bolts fell/vibrated off and now I need 2 new one and IDK where to get them, help please!!!!

That darker bolt is the one that fell out on the other side

 

google 30811992

 

I would add blue(serviceable) loctite if they dont come precoated

 

Never heard of that but all bolts on braked have some form of lock tight on , so when you remove them , 'hard to do' its best to put some on unless your bolts got very loose and got damaged then they should be fine , but bolts are cheaper that your life