Replace the sensor
The pads need to be changed when they wear out. That is determined by how you drive. Can be as little as 20,000 miles or as high as 60,000 miles. Once you hear the warning signal, (Squeal) that the pads need replacing, if you immediately replace them you can easily have the rotors trued and not have to replace them. If you ignore this warning, you may end up replacing the rotors. Any good machine shop will tell you if they are too thin to turn.
very easy to replace by yourself... each rotor runs around $100 from dealer. You should replace the pads while your replacing the rotors. order them online to save some money
You do not need a torque wrench when replacing brake pads and rotors. Some of the tools needed to change the rotors and pads are the c-clamp, sockets, wrench, grease, and brake cleaner.
No.
answer
Yes.
Replacing brake rotors on a Chrysler Pacifica will vary in price depend on the labor cost. The price should be around $150 dollars.
depends on the condition od the pads. If worn or have groves etc from the rotors then replace.
The majority of the stopping power is performed by the front rotors. I would start by replacing them.
depending on the material you can machine them true again
Don't know about calipers - have never needed to replace those. If you are replacing, yourself, the parts (pads and rotors) will cost anywhere from $120 up for front pads and rotors (pads $20 up for a full set, rotors $45 up each). If you check the web, there are some sites where you can order an entire set (pads and rotors) for around $90.
Could be a drive belt or brake warning device. Check your belts, and have your brakes inspected. More than likely this is your brakes. There is a metal warning device that will make a noise like you describe when the pads wear to a certain point. This indicates they need replacing. Ignore this warning and you will ruin the rotors.