they have to be pressed in, if you can take the hubs off and get it to a machine shop, they should be able to do it for $50-75/side, depending on labor rates in your area.
If you are going to take off the hub then just replace it, as the bearing is already in a new hub! At your local Canadian Tire (Canada) or Pep-Boys (USA) they are only tops $50.00 CDN.
No, you need a press to remove and install the bearing.
Check the wheel bearings and the front brakes for wear. These are the most common places that cause the roar.
you need to press out the bearing inside the hub assembly.
does a 2002 mazda protege have a front wheel drive
Having mine done as we speak. $500
yes
behind the plastic grill on the front.
Make sure it isn't the tire first. You will have to remove the strut, and have the bearing pressed out.
As far as i know yes.
Directly in front of the driving seat.
it is located on the motor in the front
It does the link between the manifold and the catalyser.