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Last week the brake light on the dash was blinking on and off, but has since gone away. Today while driving home I lost pretty much all brake pedal pressure. I was able to push the pedal to the floor. Then I go out an hour later to check fluid level(which is ok. I take it for a drive and the brakes work fine. Does anyone know what the problem could be? Thanks in advance

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The Rear Caliper is also making a noise could it be a faulty rear caliper?

joeffrS4

You could have lost a pad and now are metal to metal on the rotor. Check the rear brakes to be sure. You should replace rotors and pads on both sides if this is the case. Not difficult to do. Autozone will loan you a brake caliper kit that rotates the piston back in on the caliper. I think I put a $100.00 deposit down but, it made the job easy. Purchased the pads and rotors from Blau Parts. Good Luck

DAS4

inspect your brake lines for minor leaks

s4master1

your master cylinder is failing
replace it soon and make sure you get the updated one

MonroeS4

It's not pads as there would still be pedal pressure. There will be no brake line leak because you stated the fluid had no loss.
Master cyclinder bad(leaking Internally), bad vacumn due to a leak in vacumn line or bad brake booster.