Pontiac Bonneville 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 Pontiac Bonneville Brake Master Cylinder Replacement is $224 with $84 for parts and $140 for labor. Prices may vary depending on your location.

Car	Service	Estimate	Shop/Dealer Price
2004 Pontiac BonnevilleV8-4.6L	Service typeBrake Master Cylinder Replacement	Estimate$596.02	Shop/Dealer Price$709.88 - $1043.34
1993 Pontiac BonnevilleV6-3.8L Turbo	Service typeBrake Master Cylinder Replacement	Estimate$366.61	Shop/Dealer Price$420.13 - $576.16
1994 Pontiac BonnevilleV6-3.8L	Service typeBrake Master Cylinder Replacement	Estimate$366.61	Shop/Dealer Price$420.16 - $576.21
2001 Pontiac BonnevilleV6-3.8L Turbo	Service typeBrake Master Cylinder Replacement	Estimate$578.21	Shop/Dealer Price$688.12 - $1013.68
2000 Pontiac BonnevilleV6-3.8L Turbo	Service typeBrake Master Cylinder Replacement	Estimate$578.21	Shop/Dealer Price$689.60 - $1016.26
1999 Pontiac BonnevilleV6-3.8L Turbo	Service typeBrake Master Cylinder Replacement	Estimate$467.77	Shop/Dealer Price$546.76 - $778.80
1995 Pontiac BonnevilleV6-3.8L Turbo	Service typeBrake Master Cylinder Replacement	Estimate$366.61	Shop/Dealer Price$420.17 - $576.24
1995 Pontiac BonnevilleV6-3.8L	Service typeBrake Master Cylinder Replacement	Estimate$366.61	Shop/Dealer Price$420.16 - $576.20

Show example Pontiac Bonneville 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 Pontiac mechanics

Real customer reviews from Pontiac owners like you.

Excellent Rating

(69)

Rating Summary

63

5

1

0

0

63

5

1

0

0

SEE REVIEWS NEAR ME

Claud

6 years of experience

341 reviews

Claud

6 years of experience

by Raquel Johnson

Bonneville 2000 - Spark Plugs - Detroit, MI

Claude was very informative, known and efficient!

Gregory

208 years of experience

385 reviews

Request Gregory

Gregory

208 years of experience

Request Gregory

by Trevan Dixon

Bonneville 2001 - Starter - Littleton, CO

Good man, great mechanic

Joseph

0 years of experience

646 reviews

Joseph

0 years of experience

by Berrett Maynard

Bonneville 1999 - Heater Blower Motor - Taylorsville, UT

Joseph is always prompt, and knowledgeable. Does a good inspection and get's to work ... fixes the issues quickly and very friendly.

Joe

0 years of experience

528 reviews

Joe

0 years of experience

by Bob G Kellum

Bonneville 2005 - Power Steering Pressure Hose - Fairview, TN

Joe was a little late but he texted me before our appointment to let me know. Once he arrived he was very professional and repaired my vehicle in an expert manner. He had all of the tools and parts needed to complete the job with him and there were no surprises.

Excellent Rating

(69)

Rating Summary

63

5

1

0

0

63

5

1

0

0

SEE REVIEWS NEAR ME

Recent articles & questions

Top 10 Scenic Drives in New Mexico

It is difficult to characterize New Mexico with its array of cultural influences and diverse terrains. From sweeping desert lands to verdant forests to regions that look more like the surface of a distant planet than a part of Earth,...

How to Replace a Console Shift Indicator Bulb

Console shift indicator bulbs allow you to view your gears in the dark. This bulb can either last the life of the car or break unexpectedly.

Disabled Driver Laws and Permits in South Dakota

In In South Dakota, you can obtain disability placards and plates if you are disabled. These will allow you to park in special spots, and also allow you other privileges under the law, assuming that you fill out the appropriate...

Speedometer not working when warm.

Due to the fact this condition is caused by both outside weather and engine temperature I am inclined to look at the vehicle speed sensor side of the circuit as interior cabin temperature is less effected especially by engine temperature....

AC stopped blowing

I would ask for help from one of the mechanics at YourMechanic. They can come to you and check your air conditioning system (https://www.yourmechanic.com/services/heating-ac-inspection) and fan belt to see what is causing your problem. Once the problem has been diagnosed,...

Power steering quit working - 1991 Cadillac Fleetwood

Hi! I'd take a look to be sure the power steering belt is still there. With the engine running, you should be able to see the p/s pump pulley turning. The reservoir should be filled to the full mark. Listen...

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 (844) 997-3624 · hi@yourmechanic.com