Audi S8 Brake Master Cylinder Replacement Costs

Estimate price near me

Service Location

Customer Ratings

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.

See availability

Customer Ratings

Brake Master Cylinder Replacement Service

How much does a Brake Master Cylinder Replacement cost?

On average, the cost for a Audi S8 Brake Master Cylinder Replacement is $359 with $177 for parts and $182 for labor. Prices may vary depending on your location.

Car	Service	Estimate	Shop/Dealer Price
2008 Audi S8V10-5.2L	Service typeBrake Master Cylinder Replacement	Estimate$676.02	Shop/Dealer Price$797.43 - $1129.24
2014 Audi S8V8-4.0L Turbo	Service typeBrake Master Cylinder Replacement	Estimate$652.42	Shop/Dealer Price$758.08 - $1056.50
2015 Audi S8V8-4.0L Turbo	Service typeBrake Master Cylinder Replacement	Estimate$616.50	Shop/Dealer Price$713.30 - $984.86
2003 Audi S8V8-4.2L	Service typeBrake Master Cylinder Replacement	Estimate$795.99	Shop/Dealer Price$953.57 - $1412.75
2018 Audi S8V8-4.0L Turbo	Service typeBrake Master Cylinder Replacement	Estimate$1151.87	Shop/Dealer Price$1396.72 - $2121.53
2001 Audi S8V8-4.2L	Service typeBrake Master Cylinder Replacement	Estimate$795.99	Shop/Dealer Price$954.03 - $1413.55
2009 Audi S8V10-5.2L	Service typeBrake Master Cylinder Replacement	Estimate$661.60	Shop/Dealer Price$776.10 - $1102.74
2017 Audi S8V8-4.0L Turbo	Service typeBrake Master Cylinder Replacement	Estimate$1224.86	Shop/Dealer Price$1468.73 - $2192.79

Show example Audi S8 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 Audi mechanics

Real customer reviews from Audi owners like you.

Excellent Rating

(14)

Rating Summary

14

0

0

0

0

14

0

0

0

0

SEE REVIEWS NEAR ME

Peter

44 years of experience

1397 reviews

Peter

44 years of experience

by Simon

Audi S8 V8-4.2L - Car AC Repair - Glendale, Arizona

He's Awesome!... would highly recommend. Never used YOUR MECHANIC before, was pleasantly surprised and now you have another repeat customer. Thank you Simon

Claud

9 years of experience

640 reviews

Claud

9 years of experience

by Jay

Audi S8 V8-4.0L Turbo - Oil Change - Southfield, Michigan

Showed up one time completed the job with ease and gave me a rundown on what I need to do next in the future

RAYMOND

39 years of experience

7 reviews

Request RAYMOND

RAYMOND

39 years of experience

Request RAYMOND

by Michael

Audi S8 V8-4.0L Turbo - Pre-purchase Car Inspection - Parsippany, New Jersey

Great service

Kenneth

21 years of experience

870 reviews

Request Kenneth

Kenneth

21 years of experience

Request Kenneth

by Eddie

Audi S8 V10-5.2L - Coolant is leaking - Inglewood, California

Great and knowledgeable about cars

Excellent Rating

(14)

Rating Summary

14

0

0

0

0

14

0

0

0

0

SEE REVIEWS NEAR ME

Recent articles & questions

The Guide To Colored Curb Zones in Oklahoma

Oklahoma Oklahoma parking law: understanding the basics The parking laws in Oklahoma are in place to help keep people safe and to ensure that traffic is able to flow properly. People who park incorrectly or in locations that are dangerous...

The Guide To Colored Curb Zones in Washington

Washington Washington parking laws: understanding the basics Drivers in Washington are responsible for making sure that their vehicles are not hazards when they are driving on the roads, as well as when they are parked. Whenever you park, you need...

A Buyer’s Guide to the 2012 Chevrolet Malibu

While While many people thought that Toyota and Honda had taken over the mid-size family sedan market with models like the Camry and the Accord, Chevrolet surprised the whole market with the Malibu. Available with either a four- our six-cylinder...

Car loses power, cannot start. 2002 Mercedes-Benz CL500

Hello there, misfires are a common fault on cars as they get older such as the 2002 Mercedes CL500. Many different faults can cause the misfires such as the spark plugs (https://www.yourmechanic.com/services/spark-plugs-replacement), coil packs (https://www.yourmechanic.com/services/ignition-coil-replacement), fuel injectors (https://www.yourmechanic.com/services/fuel-injector-replacement), fuel pump...

Check engine light is on, shows cam sensor that I already replaced two times. Still the same code for camshaft sensor. It starts if I unplug cam sensor

Hello there, thanks for writing in. I'd be happy to help. If you replaced the sensor twice and the issue persists, then I would look at the connector and ECM as possible sources of the issue. I would carefully inspect...

Why car is sluggish starting?

Hello, There are many different things that could potentially contribute to your car starting sluggishly, however I would recommend starting with checking the most common things like the starter, starter relay and starter solenoid. These are things that may not...

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