Skip the auto shop - Our mechanics make house calls

Q: Need to know if I need to have brakes replaced at the same time as the master cylinder?

asked by on

The brake makes a hydraulic type noise. When I press the brake pad, the SUV keeps sliding. The brake pedal sticks to the floor when I try to stop.
My car has an automatic transmission.

Hi, thanks for writing in. I’d be happy to provide my insight. You do not automatically need to replace the brakes with the master cylinder. When facing brake issues, always do a full inspection. Brakes are such a critical safety component, so ensure they are functioning 100%. If the brake pads, rotors, drums, or shoes are considered good according to manufacturer specifications, then you do not need to replace them. Inspect the brake booster as well. If replacing the master cylinder at home, make sure there are no leaks on the system. If you are loosing brake fluid, and its not leaking from the master, you have a leak and it must be repaired. Hydraulic fluid always needs to be bled after the system is opened and exposed to air. This process eliminates any air in the system that will compress and not allow the brakes to compress completely. Always refill the master cylinder with new hydraulic brake fluid when working on the system. If you would like help, consider having an expert automotive technician from YourMechanic come to your home or office to inspect and diagnose this issue for you, and make or suggest any repairs as needed.

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!
  • Home
  • Questions
  • Need to know if I need to have brakes replaced at the same time as the master cylinder?

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: Are rear struts from a 2003 Buick LeSabre capable to go on my 1998 Grand Prix?

Hello - according to the interchange manuals, yes, the rear struts are interchangeable for these 2 GM vehicles. I would certainly compare them visually before disassembling your Grand Prix, just to be sure. If you need assistance, I recommend strut...

Q: changing the glow plugs

The Mk 2 series 1.6l TDCI engines - up to 6/2011 build date have a 120mm length glow plug. The Mk3 series 1.6l TDCI engines, starting 02/2011 utilize a 114mm length glow plug. Diameter of the glow plug threads is...

Q: Just got code P0430. How long till catalytic converter fails completely?

Hi, thanks for writing in. This P0430 code is for the bank B or driver side converter or the O2 sensor after the converter. The code will need to be diagnosed to isolate the problem to the sensor or the...

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 to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...