Q: what could be wrong if I have spongy pedal and i have replaced master cylinder and bleed brakes multiple times?

asked by on

I have replaced both rear wheel cylinders front and rear brake pads, master cylinder and brake booster. I bled brakes multiple times and taken it to shop and they still cant figure out why my brakes wont work correctly.What could be wrong?

My car has 200000 miles.
My car has an automatic transmission.

There are several factors that can lead to a spongy brake pedal. When there is fluid loss, it could be caused by a faulty caliper, bad wheel cylinder, leaking master cylinder, or even a ruptured line. Things can get a little more annoying when there is no fluid loss. When there is no fluid loss on older vehicles that have a spongy brake pedal, the first thing I like to look for is a rubber brake hose that is showing signs of failure. As the brake hoses age, they don’t always just rupture and lose fluid. A lot of times they will give warning signs, like bulging when the brake pedal is pressed. When you hit the pedal, they will actually swell up like a balloon because the hose has actually failed internally. It is possible that there could be a problem with a master cylinder, or even an anti-lock brake controller, but the hoses are where I would begin my search. If this is something that you feel you could use a hand identifying, consult a certified mechanic, like those available at YourMechanic.com.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. what could be wrong if I have spongy pedal and i have replaced master cylinder and bleed brakes multiple times?

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Car not going even with gas pedal all the way down

If by "won't go" you mean the car doesn't have any acceleration, then the vehicle could be misfiring to a point of failure. If multiple cylinders are misfiring all at the same motor won't expel enough power to efficiently move...

Q: brake system

Hello. We will be happy to assist you. The brake pedal being lost is likely related to a hydraulic leak and the brake pedal being hard might be related to a faulty brake booster. When changing the ABS pump the...

Q: there is a loud rattling noise that sounds like its coming from transmission and only does it during acceleration and higher RPMs

It's possible the code(s) stored when the check engine light came on might provide some clues although your onboard diagnostics system is an early version (OBD-I) and so the data reported is not very detailed. Nevertheless, a first thing to...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.