Vehicle Pulls to one side while braking

Hello,
Can someone please explain the reason why the vehicle pulls to one side while braking. I know that the rotors and pads have to be replaced, but is there anything else that I need to be bothered about.

Thanks

If you know for a fact the brakes need work and/or replaced then that would explain it. Check into the brake situation first before assuming there are any other problems.

It could be a stuck caliper, bad hose, or many other brake system components.