If your brakes fail, pump the brake pedal. Pumping might temporarily restore enough brake fluid pressure to slow or stop your vehicle. Downshift into a lower gear. This uses the braking power of the engine to slow your vehicle. Apply the parking or emergency brake gradually, but be ready to release it if you start to skid. As a last resort, release the accelerator, head toward open country or a gentle embankment, and let the vehicle slow itself down. You should avoid a collision, especially a head-on collision, if at all possible.