BMW 2800 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

(6,184)

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

(6,184)

Brake Master Cylinder Replacement Estimate for BMW 2800

BMW 2800 Brake Master Cylinder Replacement costs $576 on average.

CarServiceEstimateShop/Dealer Price
1973 BMW 2800L6-2.8LService typeBrake Master Cylinder ReplacementEstimate$1012.24Shop/Dealer Price$1268.51 - $1949.11
1968 BMW 2800L6-2.8LService typeBrake Master Cylinder ReplacementEstimate$996.24Shop/Dealer Price$1248.08 - $1925.36
1969 BMW 2800L6-2.8LService typeBrake Master Cylinder ReplacementEstimate$996.24Shop/Dealer Price$1248.08 - $1925.35
1971 BMW 2800L6-2.8LService typeBrake Master Cylinder ReplacementEstimate$996.24Shop/Dealer Price$1248.02 - $1925.24
1970 BMW 2800L6-2.8LService typeBrake Master Cylinder ReplacementEstimate$996.24Shop/Dealer Price$1248.12 - $1925.43
1974 BMW 2800L6-2.8LService typeBrake Master Cylinder ReplacementEstimate$996.24Shop/Dealer Price$1248.08 - $1925.35
1972 BMW 2800L6-2.8LService typeBrake Master Cylinder ReplacementEstimate$1004.24Shop/Dealer Price$1255.70 - $1932.68
Show example BMW 2800 Brake Master Cylinder Replacement prices

Brake Master Cylinder Replacement Service

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 BMW mechanics

Real customer reviews from BMW owners like you.

Excellent Rating

(6,184)

Rating Summary
5,757
196
55
43
133
5,757
196
55
43
133

Victor

11 years of experience
211 reviews
Victor
11 years of experience
BMW 528i L6-2.8L - Brake Master Cylinder Replacement - Virginia Beach, Virginia
Victor was timely with his arrival. He was courteous and interested in solving my car problem. We had meaningful conversation about the car and the repair. It was a pleasant experience and I would request Victor as my mechanic again.

James

16 years of experience
23 reviews
James
16 years of experience
BMW M5 V8-5.0L - Brake Master Cylinder - Morrisville, Pennsylvania
James went above and beyond when my brake master cylinder replacement (that I attempted to do myself) went awry. He spent plenty of time making sure the brakes were bled correctly. I highly recommend James.

Chris

22 years of experience
2124 reviews
Chris
22 years of experience
BMW 735i L6-3.5L - Brake Master Cylinder - San Juan Capistrano, California
Chris was punctual and professional. Very efficient and knowledgeable. Work was done in the manner that I expected. Good mechanic...

Chris

16 years of experience
419 reviews
Chris
16 years of experience
BMW M3 V8-4.0L - Oil Change - San Francisco, California
Chris was great! He was fast and knew what needed to be done. Knew the BMWs well!

Excellent Rating

(6,184)

Rating Summary
5,757
196
55
43
133
5,757
196
55
43
133
Number of BMW services completed
68024+
services done by our mechanics
TOTAL NUMBER OF EXPERT BMW MECHANICS
1100+
experts on our platform

Recent articles & questions

How to Use Apple CarPlay
Apple’s CarPlay gives you a new, safe way to use your phone while driving — without taking your eyes off the road.
How to Replace a Cruise Control Vacuum Bleed Switch
Cruise control slows when the vacuum bleed switch activates. It fails if the cruise control deactivates automatically or will not hold the speed.
How to Replace an Interior Car Door Handle
The inside handles on car doors fail when the handles come loose or when the doors are either hard to open or will not open at all.

If my mechanic says I have dark brake fluid, do I need to bleed the brakes?

Hi John. Thanks for sending in your question today. With today's ABS systems, bleeding the brakes or flushing the brake system due to contaminated brake fluid is a very complex process that requires special tools to complete it correctly. If...

Clunk Clunk over bumps and potholes

Hi there. Diagnosing a clanking noise when you hit a pot hole or other bumps in the road is incredibly difficult to pinpoint, due to the dozens of moving parts that comprise the steering, drive line and braking system on...

Would low engine oil cause the check engine light to come on in my 2002 Toyota Corolla

Hello. Typically low engine oil will not cause the check engine light to come on in your vehicle. Unless the oil level is low enough to cause a drop in engine oil pressure, the oil light will not even come...

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