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Brake pads are worn. That noise is the sound of the backing plate for the brake pads hitting the rotors. You will need to replace the pads and probablt the rotors. When the brakes go metal to metal like that it typically destroys the rotor.
Normally a "pulsing" brake pedal means that that you have a warped brake rotor or the brake caliper is lose. I would start by taking the front wheel off and inspecting the brake pads and the rotor. If the brake pads are worn down bad replace them. Pay special attention to the brake rotors also as if the are grooved very bad, they should also be replaced.
Did they tell you why you need to replace the rotors? Sometimes you need to do this if you waited to long to change the brake pads and you have metal against mnetal and it warps the brake rotor. I would recommend going to get another company to look at the brakes to make sure that you are not being sold a bill of goods you don't need. I hope that this helps! I have the same car and have been driving Volvo's for years. Do you know when you changed out the front brakes last? That may help you some to know but if you do a lot of stop and go driving, you would need to change the brake pads more frequently. Usually the front brakes go sooner than the rear but I am not sure if this is true with awd. But this is my first awd too.
The grinding noise probably means you need to put new brakes on. If you fill the brake fluid reservoir, and then change the brakes, the new fluid will run out anyways, because the new brakes will have to be put in, and the fluid will run out.
sounds like its to late..the scrapping noise is rotors or pads gouging the drums or rotor surface, both these can be repaired if within spec....take them off and to a repair shop and the tell you if they can be repaired.
Pads may be acting as phonograph needles and "playing back" the cut pattern on the rotors. To eliminate this tendency most dealerships now use a DA sander on the rotor faces while the rotors are still turning on the lathe, to break the pattern, making it non directional. (I've been doing this on all vehicles since the 70's) If this was not done, they will make noise. Sometimes sound deadening inserts can be placed behind pads or a liquid made for this purpose can be applied to backings. But, the first method is generally the best. Other than that, if the pads are not binding or wearing prematurely, there should be no noise.
it could be because they are dirty. also the noise could be the back brakes. if its a squeaking noise it could be that they are dirty or that they are cheep brake pads and for the first couple of weeks they squeak. also when you got your breaks changed did the break shop cut the rotors because that cleans them up and makes the rotors like new.
I am trying to change my volvo cx90 rotors and brakes. I have manage to get everything off xcept rotors, the rotors are hanging loose but its attached to some bolts which I cant get off, pls can you help with any ideas