The brake fluid reservoir on a 2001 Ford Mustang is typically located
under the hood, near the firewall, and often has a bright, easily-visible cap (usually yellow or red). It's usually a small, cylindrical reservoir. Look around the master cylinder, which is a cylindrical component also near the firewall. The brake fluid reservoir will be connected to the master cylinder.
However, the exact location might vary slightly depending on the engine and trim level. If you're having trouble finding it, a quick online search for "2001 Ford Mustang brake fluid reservoir location" with images will likely show you exactly where it is on your specific model. Using your vehicle's VIN number in the search might provide even more precise results.
