Skip the auto shop - Our mechanics make house calls

Q: New brakes going to the floor

asked by on

The brakes are fairly new, but they are going to the floor and sometimes not stopping well. I hear a squeaking noise in the morning when the car hasn't been driven. I called a couple of shops, and they said there was a problem with the master cylinder or booster.

A: Hi. It sounds like a hydraulic issue. If th...

Hi. It sounds like a hydraulic issue. If there are no external leaks in the hydraulic system and it is full of fluid, yes, the master cylinder sounds to be faulty. The pedal goes to the floor because the master cylinder developed and internal leak. The leaking pressure causes the pedal to go to the floor. A booster is ran by a vacuum and the failure feels completely different. Booster failure causes the pedal to get very stiff and often requires you to step on the pedal with both feet to get the car to stop. Replacing the master cylinder will require bleeding the cylinder and the system after replacement. If you need further assistance, I recommend you have a certified technician, like one from YourMechanic, inspect the brake system on your vehicle and suggest an appropriate repair.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: If I have a ball joint replaced on a Kia Sorento will I need an alignment?

Hello, thanks for writing in about your Kia Sorento. Any time you replace suspension components, the alignment should at least be checked and/or performed. If you need some assistance with the replacement of your ball joints, consider YourMechanic. One of...

Q: Steering feels very loose.

Hi there. When did this condition begin to occur? Are the correct size tire, properly inflated, installed? It sounds like there may be worn bushings that are allowing movement when you attempt to steer the vehicle. These could be control...

Q: Why is my car not accelerating?

This may be a sign of a failing throttle position sensor. The throttle position sensor (TPS) is a sensor used to monitor the throttle position of the throttle plate inside the throttle body in relation to your foot position on...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...