Symptoms of 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.
What happens when the master cylinder goes bad?
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.
How much does it cost to replace a master cylinder?
The Average Replacement Cost
If you have a brake master cylinder that goes bad, the average cost to replace the cylinder will be between $320 and $500. The cost of the part itself will only be around $100 to $210. But the biggest expense of the replacement job will be in the labor costs, which are around $230 to $300.
How does a master cylinder work?
When you press the brake pedal, it pushes on the primary piston through a linkage. Pressure builds in the cylinder and lines as the brake pedal is depressed further. The pressure between the primary and secondary piston forces the secondary piston to compress the fluid in its circuit.
Photo in the article by “Flickr”