Audi A3 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

(141)

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

(141)

Brake Master Cylinder Replacement Estimate for Audi A3

Audi A3 Brake Master Cylinder Replacement costs $306 on average.

CarServiceEstimateShop/Dealer Price
2011 Audi A3L4-2.0L TurboService typeBrake Master Cylinder ReplacementEstimate$344.67Shop/Dealer Price$433.44 - $628.09
2012 Audi A3L4-2.0L TurboService typeBrake Master Cylinder ReplacementEstimate$331.67Shop/Dealer Price$416.84 - $608.79
2015 Audi A3L4-1.8L TurboService typeBrake Master Cylinder ReplacementEstimate$778.41Shop/Dealer Price$974.75 - $1514.86
2007 Audi A3L4-2.0L TurboService typeBrake Master Cylinder ReplacementEstimate$331.67Shop/Dealer Price$416.79 - $608.70
2013 Audi A3L4-2.0L Turbo DieselService typeBrake Master Cylinder ReplacementEstimate$340.65Shop/Dealer Price$428.10 - $626.81
2017 Audi A3L4-2.0L TurboService typeBrake Master Cylinder ReplacementEstimate$811.39Shop/Dealer Price$1004.38 - $1547.04
2016 Audi A3L4-2.0L Turbo DieselService typeBrake Master Cylinder ReplacementEstimate$817.89Shop/Dealer Price$1022.68 - $1574.18
2011 Audi A3L4-2.0L Turbo DieselService typeBrake Master Cylinder ReplacementEstimate$338.17Shop/Dealer Price$423.88 - $616.23
Show example Audi A3 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 Audi mechanics

Real customer reviews from Audi owners like you.

Excellent Rating

(141)

Rating Summary
133
5
3
0
0
133
5
3
0
0

Greg

22 years of experience
207 reviews
Greg
22 years of experience
Audi A3 L4-2.0L Turbo Diesel - Oil Change - Queen Creek, Arizona
Job well done! Greg was on time and professional. He treated my vehicle with care. He completed the job smoothly and so far so good. First time using Your mechanic and it was a pleasant experience. I will be looking into them again. Thanks Greg!

Khoa

20 years of experience
402 reviews
Khoa
20 years of experience
Audi A3 L4-1.8L Turbo - Cabin Air Filter Replacement - Redwood City, California
On time. Efficient. Great job. Impressed!

Peter

43 years of experience
1321 reviews
Peter
43 years of experience
Audi A3 L4-2.0L Turbo - 110,000 Miles Maintenance Service - Phoenix, Arizona
Peter was great. He arrived early and was extremely knowledgeable. He walked me through the process and shared other bits of information that would prevent future issues. After the job, Peter made sure to clean the work area. Highly recommended.

John

36 years of experience
408 reviews
John
36 years of experience
Audi A3 L4-2.0L Turbo - Brake Pads Replacement (Front, Rear) - San Francisco, California
John is fantastic. He showed up on time (even a little early) and did a great job replacing all four brake pads. The first thing he did was make sure that all four pads actually needed to be replaced--he said often people request all four to be changed but only two of them need to be (in my case, I knew all four needed to be changed, and he agreed). He was extra careful not to damage the garage floor (which had just been sealed), showed me the worn pads that were removed after he was finished, and waited for me to drive the car around the block to make sure there were no issues. Took photos to document everything. No complaints, and I will be happy to pay John to work on my car again.

Excellent Rating

(141)

Rating Summary
133
5
3
0
0
133
5
3
0
0
Number of Audi A3 services completed
1551+
services done by our mechanics
TOTAL NUMBER OF EXPERT Audi MECHANICS
700+
experts on our platform

Recent articles & questions

Top 3 Reasons Engine Oil Gets in the Air Filter
Engine oil should never be in the air filter. Depending on how it got there, minor or major repairs may be needed.
Signs You Need a New Car Heater
Car heaters are a key car part for those living in cooler climates. A common sign your car heater isn't working is when air doesn't heat up quickly.
How to Replace a Car Combination Valve
The combination valve balances your brake system. If broken, it should be replaced to ensure a safe driving experience.

I ahce a 2007 cts which i recently changed the fuel pump and now i cant get an accurate gauge reading on fuel

Head set changed to spanis. I need english

Hi Beverly. We really need your car's information to help you here. Each manufacturer has unique steps that need to be completed to change the language settings for their information center. Please let us know this valuable information and we...

Jerking apon acceleration

Further diagnosis as to why the check engine light is on should be done. A repeat code for the knock sensor may be caused by a wiring issue or even due to a faulty pcm (power control module). Odds are...

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