Mercedes-Benz ML430 Brake Master Cylinder Replacement at your home or office.

Our mobile mechanics offer services 7 days a week. Upfront and transparent pricing.

Estimate price near me

Service Location

Customer Ratings

(31)

Included for free with this service

Online Booking

Mechanic comes to you

12-month / 12k-mile warranty

Free 50 point safety inspection

Our certified mobile mechanics can come to your home or office 7 days a week between 7 AM and 9 PM.

Customer Ratings

(31)

Brake Master Cylinder Replacement Service

How much does a Brake Master Cylinder Replacement cost?

On average, the cost for a Mercedes-Benz ML430 Brake Master Cylinder Replacement is $436 with $313 for parts and $123 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2000 Mercedes-Benz ML430V8-4.3LService typeBrake Master Cylinder ReplacementEstimate$774.57Shop/Dealer Price$953.59 - $1439.47
2001 Mercedes-Benz ML430V8-4.3LService typeBrake Master Cylinder ReplacementEstimate$748.57Shop/Dealer Price$927.63 - $1413.54
1999 Mercedes-Benz ML430V8-4.3LService typeBrake Master Cylinder ReplacementEstimate$748.57Shop/Dealer Price$927.63 - $1413.53
Show example Mercedes-Benz ML430 Brake Master Cylinder Replacement prices

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.

Master Cylinder

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

(31)

Rating Summary
31
0
0
0
0
31
0
0
0
0

Jason

17 years of experience
429 reviews
Jason
17 years of experience
Mercedes-Benz ML430 V8-4.3L - Window is not working - Livermore, California
Amazing

Whitney

39 years of experience
783 reviews
Whitney
39 years of experience
Mercedes-Benz ML430 V8-4.3L - Pre-purchase Car Inspection - San Jose, California

Jerimiah

19 years of experience
328 reviews
Jerimiah
19 years of experience
Mercedes-Benz ML430 V8-4.3L - Car is overheating - Las Vegas, Nevada
Informational

Vadym

6 years of experience
43 reviews
Vadym
6 years of experience
Mercedes-Benz ML430 V8-4.3L - Serpentine/Drive Belt Replacement - Denver, Colorado
Very friendly, knew what he was doing. Got the work done fast and efficiently.

Excellent Rating

(31)

Rating Summary
31
0
0
0
0
31
0
0
0
0
Number of Mercedes-Benz ML430 services completed
341+
services done by our mechanics
TOTAL NUMBER OF EXPERT Mercedes-Benz MECHANICS
1100+
experts on our platform

Recent articles & questions

A Buyer’s Guide to the 2012 Acura MDX
The The Acura MDX is one of the favorite SUV among consumers. It has room enough for seven passengers, has great handling, and is accommodating to all types of weather conditions. With its advanced technology and performance capability, it is...
P0112 OBD-II Trouble Code: IAT Sensor Circuit Low Input Problem
P0112 P0112 code definition Intake Air Temperature (IAT) sensor circuit low input problem What the P0112 code means P0112 is the OBD-II generic code that the engine control module (ECM) has recorded the IAT sensor input below the expected sensor...
P0116 OBD-II Trouble Code: ECT Sensor Circuit Range Performance Problem
P0116 P0116 code definition Engine Coolant Temperature (ECT) sensor circuit range performance problem What the P0116 code means P0116 is the OBD-II generic code that indicates the engine control module (ECM) ECT monitor has read that the ECT sensor range...

Delay in shifting, rambling noise when accelerating

Various items can cause similar symptoms to the ones you have described. The most common would be a bad fuel filter, transmission fault, torque converter issue, shift solenoid problem, low fuel pressure, or a failed fuel injector. All of these...

Smoke from exhaust still after new PCV and turbo

Hi there, thanks for writing in. I am sure that you have driven your car far enough (since repairs) to rule out residual oil in the exhaust system. The P0015 "cam retard" code (https://www.yourmechanic.com/article/p0015-obd-ii-trouble-code-camshaft-position-b-timing-over-retarded-bank-1-by-jay-safford) may be a cam sensor, oil...

The car says steering assist fault service required, what do i do

Hi there. Your car’s Power Steering system includes both the normal Hydraulic system used for many years now to make steering your car easier, as well as a Power Steering Assist system that augments the regular power steering. If a...

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 (855) 347-2779 · hi@yourmechanic.com