Mercedes-Benz GLC63 AMG Brake Master Cylinder Replacement Costs

Car	Service	Estimate	Shop/Dealer Price
2018 Mercedes-Benz GLC63 AMGV8-4.0L Turbo	Service typeBrake Master Cylinder Replacement	Estimate$873.20	Shop/Dealer Price$1045.81 - $1553.09

Car

Service

Estimate

Shop/Dealer Price

2018 Mercedes-Benz GLC63 AMGV8-4.0L Turbo

Service typeBrake Master Cylinder Replacement

Estimate$873.20

Shop/Dealer Price$1045.81 - $1553.09

What is the brake master cylinder and how does it work?

The brake master cylinder has a piston that pressurizes fluid in the brake lines to each wheel cylinder as you apply force to the brake pedal. That pressure moves the pistons that are in the wheel cylinders. As the pistons in those wheel cylinders move, they force the brake pads or shoes tightly against the rotors or drums allowing the car to stop quickly.

The size of the pistons in the master cylinder and in the wheel cylinders are carefully selected when designing a car. This allows drivers to apply moderate pressure on the brake pedal when stopping, but creates tremendous pressure applied at the wheel cylinders. A car can then stop quickly even at high speeds. Depending on how much force is applied to the brake pedal, the pressure in a car’s brake lines will typically be in the range of 800 PSI to 2,000 PSI.

When to replace the master cylinder?

External fluid leaks. There should be no fluid visible on the external surfaces of any portion of the master cylinder or the plastic fluid reservoir.
Low, slowly falling, or spongy brake pedal. Faulty internal seals on the piston can cause internal leaks and also seepage of brake fluid into the power assist brake booster. Internal leaks will typically be accompanied by a low pedal, a spongy brake pedal, or a pedal that slowly sinks as you maintain pressure. In all cases, you will experience reduced braking abilities.
Discolored brake fluid. No brake fluids, other than those specified for the year, make, and model, are fully compatible with a car’s internal rubber seals in the master cylinder. Discoloration of brake fluid can also occur due to moisture and particulate contaminants in the fluid.
Warning lights on the dash. If the brake system warning light illuminates, there are several potential causes but failure of the master cylinder is in the list of causes that would have to be investigated.

How do mechanics replace the brake master cylinder?

On vehicles with power brakes, the master cylinder is bolted to the metal housing of the power brake booster. There is usually an electrical plug connecting to a brake fluid level sensor on the master cylinder reservoir and that plug must be disconnected.
Once all steel brake lines are disconnected from the master cylinder, the master cylinder is unbolted from the brake booster and removed from the vehicle.
The new master cylinder must be bench-bled to expel air from internal passages that contain the piston. Then the new master cylinder is bolted to the brake booster and the brake lines are reattached. The electrical plug for the fluid level sensor is reconnected.
Whenever a new master cylinder is installed, brakes lines to wheel positions must be bled to remove air, old fluid and contaminants. If your vehicle is equipped with anti-lock brakes, the mechanic may use a bidirectional scan tool during brake bleeding to actuate the ABS pump, thus ensuring that all air is removed from the complex valving in the ABS system.
All brake line connections that were removed during the master cylinder replacement are inspected for any leakage and the vehicle is road tested to ensure normal operation of the brakes.

Is it safe to drive with a master cylinder problem?

No, any fault in the master cylinder, which is part of the braking system creates a safety risk. A fully operational brake system is essential to quickly stopping your car. Driving a vehicle isn’t safe, if the master cylinder is leaking or has other faults, as braking distances might be longer than normal. The braking system on a vehicle is among the most important safety systems and must be fully functional to safely drive your vehicle.

When replacing the master cylinder keep in mind:

The master cylinder is only one component of many in a vehicle’s braking system. During replacement of the master cylinder, all vehicle braking system components should be inspected to ensure maximum braking power is available.
The amount of friction material remaining on the brake pads and brake shoes should be verified.
Brake lines and flexible rubber hoses at each wheel position should be inspected for corrosion and deterioration.
The power brake booster should be evaluated to ensure that power assist is working properly.

Fast and easy service at your home or office

Backed by 12-month, 12.000-mile guarantee

Meet some of our expert Mercedes-Benz mechanics

Real customer reviews from Mercedes-Benz owners like you.

Excellent Rating

(8)

Rating Summary

SEE REVIEWS NEAR ME

David

6 years of experience

27 reviews

Request David

by James

Mercedes-Benz GLC63 AMG V8-4.0L Turbo - Pre-purchase Car Inspection - Sugar Land, Texas

David was selected by Your Mechanic to conduct a re-inspection after the initial inspection failed to disclose obvious cosmetic defects. David was thorough in both his inspection of the areas under concern, as well as re-inspecting the entire vehicle's condition in the event the first inspection failed to reveal less obvious defects. David confirmed the suspect cosmetic defects and I'm now working with Your Mechanic to resolve the disparity from the initial PPI conducted which should have disclosed such defects. As to David, he provided a thorough inspection, commentary via voice memos, and appropriate media for me to fully grasp the nature of the car - what should have occurred the first go around. I appreciate his professionalism and I look forward to resolving the disparity with Your Mechanic's customer response team. Things don't always go to plan, the true measure of a company's worth, credibility, and trust, is how they respond to customer's when things deviate from plan. I'm hopeful that Your Mechanic's leadership team will persevere and remedy this situation in a timely fashion. Thank you.

Frank

16 years of experience

31 reviews

Request Frank

by mike

Mercedes-Benz 450SL V8-4.5L - Brake Master Cylinder - Downers Grove, Illinois

he was on time ,polite ,professional.did the work quickly .work was done correctly..my car is difficult to work on.small car with no room to maneuver but he was able to get inside and get it done.

Patrick

34 years of experience

1579 reviews

Request Patrick

by Michael

Mercedes-Benz 240D L4-2.4L Diesel - Brake Master Cylinder - Austin, Texas

Perfect!

Michael

113 reviews

Request Michael

by Derek

Mercedes-Benz ML430 V8-4.3L - Brake Master Cylinder - Saint Augustine, Florida

Professional, knowledgeable and friendly.

Mercedes-Benz GLC63 AMG Brake Master Cylinder Replacement at your home or office.

Estimate price near me

Brake Master Cylinder Replacement Service

How much does a Brake Master Cylinder Replacement cost?

On average, the cost for a Mercedes-Benz GLC63 AMG Brake Master Cylinder Replacement is $518 with $336 for parts and $182 for labor. Prices may vary depending on your location.

What is the brake master cylinder and how does it work?

When to replace the master cylinder?

How do mechanics replace the brake master cylinder?

Is it safe to drive with a master cylinder problem?

When replacing the master cylinder keep in mind:

Meet some of our expert Mercedes-Benz mechanics

Excellent Rating

Rating Summary

David

Frank

Patrick

Michael

Excellent Rating

Rating Summary

Recent articles & questions

Car stutters when you start it

engine has been overheating.

When I put my toyota [Corolla](/topics-corolla/) car on reverse mode, it will be jerking and difficult to move or not moving on incline road but move on down slope road. What could be the cause? Thank you.

How can we help?