How do you change a master cylinder on a 2005 ford explorer sport trac?

To change the master cylinder on a 2005 Ford Explorer Sport Trac, first, ensure the vehicle is on a flat surface and the engine is off. Disconnect the negative battery terminal, then remove the brake fluid from the master cylinder reservoir to prevent spills. Unbolt the master cylinder from the brake booster, detach the brake lines (using a line wrench), and remove the old master cylinder. Install the new master cylinder by reversing these steps, ensuring to bleed the brake system afterward to remove any air.