Spongy feeling brakes

While it is possible the brake hydraulic system has air in it, that is usually because there is a brake fluid leak and if the brake fluid level hasn't needed topping up, the cause is probably elsewhere. Spongy pedal feel can be caused by a disc pad seizing so tightly in the carrier the brake disc is flexing. Seized brake caliper slides can also produce a similar thing with some designs. Do not attempt to adjust the brake pedal or linkage as that can cause other potentially very serious problems. Begin by removing the wheels and checking each brake is in good condition and working correctly and you will almost certainly find the cause of the trouble - insufficient or ineffective routine maintenance...

air in the line or bad booster. try getting the brakes bled if it doesnt fix it probably a bad booster

Bleed the brakes, but it will probably still feel spongy. When you compress the Caliper you need to open the bleeder valve to release the pressure. It sounds like you busted the diaphragm in the proportioning valve. It is a costly mistake but one made alot now that more and more vehicles have anti-locking breaks. If bleeding and replacing the fluid do not help at all then I bet on the proportioning valve.

check that fluid level is ok, by changing pad and opening calipers you may have lost fluid our of resovoir.

if your discs where not changed or skimmed at the same time you will have ridges, that do not match to the smooth pads, when you drive for a few miles eventually the pads will wear down and form the shape of the discs.

if they continue to be soft, bleed the fluid to make sure there is no air in it, if the brakes are still soft after this you should replace the brake fluid completely if it has not been done for a while as brake fluids absorbes moisture and that makes the brakes feel spongy or soft.


i hope this was useful.

WHEN FINISH REPLACING BRAKE PADS.MAKE SURE MASTER CYLINDER COVER ON FLUID LEVEL OKAY.YOU PUMP BRAKE PEDAL UNTIL BRAKE PEDAL GET FIRM HARD.IF BRAKE PEDAL KEEP GOING TO THE FLOOR YOU HAVE AIR IN THE HYDRALIC BRAKE SYSTEM.BRAKE SYSTEM NEED BLEEDING.DONT DRIVE VECHICLE IF BRAKE PEDAL FEEL SPONGY OR GO TO FLOOR.

I would bleed the rears too especially if the brake fluid reservoir drained empty. Also you may need to drive the vehicle to seat the brake pads. Check and see how the pedal feels initially before you road test to make sure you don't need to pump the brakes in order to stop. if you do then re bleed all four wheels.If you don't have to pump the pedal and it just feels spongy then try going around the block a few times and see if the pedal stiffens up after the pads have seated.

U need the special anti-lock brake (ABS) bleeder adapter to get the air out of the ABS hydraulic control unit, that is why the spongy feel the system is no completely bled of air unless you hook up the tool that holds the hydraulic control valves open for bleeding

have buddy/wife pump brakes and hold loosen bleeder screw in caliper when steady stream of fluid with no splats comes out recheck pedal feel remember to keep fluid topped off when bleeding

Check the pads/rotors to see if they need to be replaced.
Check the brake fluid level. If low it could mean the pads/rotors need to be replaced. If replacing also replace the brake fluid.
Two years probably means you need a brake job.

Otherwise you may have air in the brake lines which you can bleed off.

It's either fluid in the master cylinder leaking by the piston, or it's wheel cylinders/calipers leaking. You should take it to a shop, pronto!!