Symptoms of a Bad or Failing Brake Master Cylinder

Our certified mechanics come to you · 12-month, 12,000-mile warranty

GET A QUOTE Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of Replacing a Bad or Failing Brake Master Cylinder

Common signs of a faulty brake master cylinder include abnormal brake pedal behavior, contaminated brake fluid, and the Check Engine Light turning on. Our certified technicians can come to you and diagnose the problem. You will receive a $30 credit towards any follow-up repairs that result from the diagnostic. Following are example prices for Brake Master Cylinder Replacement. Click on the button below to get an upfront quote for your car.

Cars Estimate Parts Cost Labor Cost Savings Average Dealer Price
2006 Mitsubishi Lancer $285 $172.71 $112.00 17% $344.71
2012 Chevrolet Sonic $358 $280.71 $77.00 10% $398.96
2014 Kia Soul $389 $318.81 $70.00 8% $426.31
2012 Lexus ES350 $259 $132.86 $126.00 20% $326.36
2006 BMW 325i $420 $307.77 $112.00 12% $479.77
2013 Porsche Boxster $636 $496.24 $140.00 10% $711.24
GET A QUOTE FOR YOUR CAR Get a fair and transparent estimate upfront

How to Diagnose a Bad or Failing Brake Master Cylinder?

Brake master cylinder

The brake master cylinder is one of the most important components found on modern car braking systems. It serves as the main valve that pushes brake fluid through the brake lines so that the brake calipers can squeeze the pads against the rotors. It functions by pushing a metal rod through a cylinder to force fluid through the braking system to the wheels. One end of this rod is attached to the pedal and is actuated when the pedal is depressed. Usually a faulty brake master cylinder will produce a few symptoms that alert the driver that service may be required.

1. Abnormal brake pedal behavior

One of the first symptoms commonly associated with a bad or failing brake master cylinder is abnormal brake pedal behavior. The master cylinder is the component that generates all of the pressure for the braking system, and if it develops any sort of problems sealing or distributing pressure, this may be felt in the pedal. Over time, with constant use, the seals inside of the cylinder can wear out and form internal leaks. A bad brake master cylinder may result in a pedal that feels mushy, spongy, or that slowly sinks to the floor when depressed.

2. Contaminated brake fluid

Another symptom of a bad brake master cylinder is contaminated brake fluid. Brake master cylinders use rubber seals which can break down and wear out over time. When they do, they can contaminate the brake fluid and will turn it dark brown or black color. Aside from contaminating the fluid, a brake master cylinder with worn seals will also not be able to hold brake pressure as effectively and may also result in a mushy pedal or one that slowly sinks to the floor.

3. Check Engine Light comes on

Another symptom commonly seen for newer vehicles is an illuminated Check Engine Light. The braking systems on newer vehicles may have brake fluid level and pressure sensors installed in the master cylinder. These sensors are meant to detect any problem with the vehicle’s brake fluid pressure, which is generated by the master cylinder. If they detect that the pressure has dropped, it is possibly due to a problem with the master cylinder.

As the brake master cylinder is essentially the heart of the braking system and vital to reliable brake operation, it is an important component to the handling and safety characteristics of the vehicle. A vehicle with a bad brake master cylinder will have inoperable or compromised brakes, and therefore will be unsafe to drive. For this reason, if you suspect that your brake master cylinder is having a problem, have the brake system diagnosed by a professional technician from YourMechanic to determine if it the car needs a brake master cylinder replacement.

Check Engine Light
Braking
Spongy Brakes
brake system

Fast and easy Brake Master Cylinder Replacement service at your home or office.

GET A QUOTE FOR YOUR CAR
Get a fair and transparent estimate upfront

Recent Brake Master Cylinder Replacement reviews

Excellent Rating


YourMechanic Brake Master Cylinder Replacement Service

Average Rating

4.4/5

Number of Reviews

249

Rating Summary
230
7
2
2
8
230
7
2
2
8

Travis

8 years of experience
40 reviews
Travis
8 years of experience
Travis was punctual and professional. He is a very competent mechanic and I highly recommend him.
2008 MAZDA 3 - BRAKE MASTER CYLINDER REPLACEMENT - WINTER PARK, FLORIDA

Stefan

14 years of experience
366 reviews
Stefan
14 years of experience
2001 VOLKSWAGEN GOLF - BRAKE MASTER CYLINDER - PLEASANT HILL, CALIFORNIA

Andrew

8 years of experience
394 reviews
Andrew
8 years of experience
Everything works great AND she saved me money by pointing out things I didn't really need to have fixed right away.
2007 KIA SPORTAGE - BRAKE MASTER CYLINDER - OLATHE, KANSAS

David

10 years of experience
128 reviews
David
10 years of experience
The best
2004 FORD ESCAPE - BRAKE MASTER CYLINDER - ATLANTA, GEORGIA

More related articles

P0222 OBD-II Trouble Code: Throttle/Pedal Position Switch/Sensor B Circuit Low Input
P0222 code definition Throttle/Pedal Position Switch/Sensor B Circuit Low Input What the P0222...
The Traveler’s Guide to Driving in Malaysia
CraigBurrows / Shutterstock.com Malaysia is a popular destination for many tourists today. The country has amazing sights and attractions that you will want to explore....
P0359 OBD-II Trouble Code: Ignition Coil I Primary/Secondary Circuit Malfunction
P0359 code definition The P0359 code indicates that a fault has been detected in one of the vehicle’s ignition coils, generally the number 9 coil. This code can also be associated...

Related questions

Q: Hello I have a 2006 f150 XLT with a 2v 4.6. It has a cold air intake from k

Hi, thanks for writing in. I'd be happy to help you. Code P2104 relates the throttle position control actuator, and code P2126 relates to the throttle position sensor. When either of these components is not working properly, this can cause...

Q: Looking to replace my rear breaks

Basically, if you are concerned about the quality, suitability, durability, and proper function of a replacement part on a modern motor vehicle, and you should be, the only acceptable practice is to use dealer OEM parts. To select parts using...

Q: Hard brake pedal and rear brakes locking up.

Hi. I will help you with this issue you are having with your 2001 Durango. Unless you bled the master cylinder, it is possible there is still air in the system. If you car is equipped with ABS, air could...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1-800-701-6230 · hi@yourmechanic.com