Checking Brake Fluid Level and Leaks

WARNING: This page is about a different car, the 2008 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

Check the brake fluid level in the reservoir tank. It should be between the "Max" and "Min" lines on the reservoir tank.
Visually check around the reservoir tank for leaks.
If the brake fluid level is extremely low or below the "Min" level, check the brake system for leaks.

NOTE: If brake warning lamp is on, release parking brake lever and see if brake warning lamp goes off. If not, check brake system for leaks.

Fig 1: Checking Brake Fluid Level In Reservoir Tank

Courtesy of NISSAN MOTOR CO., U.S.A.