What does a brake master cylinder do?

The master cylinder is the heart of your car's hydraulic braking system. When you press the brake pedal, it uses your leg's force to push brake fluid through the lines, which then activates the brake calipers or wheel cylinders to slow your vehicle.

What are the signs of a failing brake master cylinder?

Common signs include a brake pedal that feels spongy or goes to the floor, a visible brake fluid leak from the master cylinder itself, or the brake warning light illuminating on your dashboard. You might also notice your brake fluid level dropping over time.

Does this master cylinder come with brake fluid?

This DFC brake master cylinder does not include brake fluid. You will need to purchase the appropriate type and amount of brake fluid separately and bleed the brake system after installation.

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Trusted Since 1957

Est. 1957

DFC 77-80 Buick LeSabre Brake Master Cylinder

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Specifications

Brand: DFC
Part #: 355-45000
UPC: 190920377273

DFC 77-80 Buick LeSabre Brake Master Cylinder

Name: DFC 77-80 Buick LeSabre Brake Master Cylinder
Brand: DFC
Price: 86.85 USD
Availability: InStock

$86.85

In Stock

DFC Brake Master Cylinder for 1977-1980 Buick LeSabre. Ensures proper brake fluid pressure.

Key Features

Fits 1977-1980 Buick Electra, Estate Wagon, LeSabre, and Riviera.
Fits 1977-1980 Cadillac Commercial Chassis, Fleetwood, and Seville.
Fits 1978-1980 Pontiac Firebird.
Converts pedal force into hydraulic pressure for braking.
Built to meet original equipment specifications for proper function.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Will this fit your vehicle?

Product Details

This is a DFC brake master cylinder, a direct replacement part for a range of 1977-1980 Buick, Cadillac, and Pontiac vehicles. It's the component that converts the force from your brake pedal into hydraulic pressure, pushing brake fluid through the lines to activate your brakes. If your brakes feel spongy, you're losing fluid, or the pedal goes to the floor, a faulty master cylinder is often the culprit.

DFC makes this master cylinder to fit right into your specific application, like a 1977-1980 Buick LeSabre or Electra, or even a 1978-1980 Pontiac Firebird. It's built to meet the original equipment specifications, meaning it should function just like the one that came from the factory. Proper installation is key here; ensure you bleed the brake lines thoroughly after installation to remove any air, which is critical for consistent braking performance.