What is a brake master cylinder and what does it do?

The brake master cylinder is the heart of your vehicle's hydraulic braking system. When you press the brake pedal, it converts that mechanical force into hydraulic pressure, pushing brake fluid through the lines to activate the brakes at each wheel.

What are the signs that my brake master cylinder needs replacement?

Common signs include a brake pedal that feels spongy or sinks to the floor when pressed, a low brake fluid level that can't be explained by leaks elsewhere, or a warning light on your dashboard indicating a brake system issue.

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 brake fluid for your BMW separately and ensure the system is properly filled and bled after installation.

DFC 98-03 BMW 540i Brake Master Cylinder

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Specifications

Brand: DFC
Part #: 355-31020
UPC: 190920374982

DFC 98-03 BMW 540i Brake Master Cylinder

Name: DFC 98-03 BMW 540i Brake Master Cylinder
Brand: DFC
Price: 124.09 USD
Availability: InStock

$124.09

Only 1 left in stock

DFC Brake Master Cylinder for BMW 5 Series and 7 Series. Ensures proper brake fluid pressure for reliable stopping.

Key Features

Fits 2001-2003 BMW 525i, 1998-2000 BMW 528i, 2001-2003 BMW 530i, 1998 BMW 540i, 1998 BMW 740i, 1998 BMW 740iL, 1998 BMW 750iL, and 2000-2001 BMW X5.
Restores proper brake fluid pressure for reliable stopping.
Converts pedal force into hydraulic pressure for the braking system.
Direct fit replacement for the original equipment master cylinder.
Well-built to meet original equipment specifications.

⚠️ 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

When you're working on the braking system and need to replace a worn-out brake master cylinder, this DFC unit is a solid option. It's designed to restore proper brake fluid pressure, which is essential for consistent and reliable stopping power. This part is a direct fit for a range of BMW vehicles, including models like the 525i, 530i, and the 740i.

This master cylinder is built to meet the original specifications for your BMW, ensuring it bolts right into place without needing modifications. A properly functioning master cylinder is key to your car's safety, as it's the component that converts the force from your brake pedal into hydraulic pressure that pushes the brake pads against the rotors. If you're noticing a spongy pedal or reduced braking performance, replacing the master cylinder is often the solution.

When installing, remember to bleed the brake system thoroughly afterward to remove any air and ensure optimal performance. This DFC master cylinder is a well-built replacement that will help get your BMW's braking system back to performing as it should.