►Your brakes are critical to safe, everyday driving, and part of that braking system is a firm brake pedal. A soft brake pedal, spongy brake pedal, or your brake pedal going to the floor, whatever you want to call it—while not the end of the world—means that there's air within the hydraulic system that applies the braking force from your foot to the calipers. As you step on the pedal, the air in the system compresses without moving the fluid on the other side, causing the pedal to depress, but the brakes to be largely ineffective.

Fixing a soft brake pedal can result in a few different replacements. There are many places in your vehicle where air can enter and fluid can leak, and you'll need to check them all until an issue is found. That said, the issue may not be visible and tricky to diagnose, so we're here to offer some guidance.

Follow along with FCP Euro's BMW Expert, Gareth Foley, as he checks the brake system on a BMW M5 to fix a soft brake pedal.

00:00 - Intro
00:28 - What a Soft Brake Pedal Looks & Feels Like
01:24 - Scanning the ABS Module for Fault Codes
03:32 - Checking the Brake Lines for Leaks
05:35 - Checking the ABS Hydraulic Unit
06:39 - Checking the Brake Booster & Master Cylinder
10:22 - Wrap-up

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