A dead cell within the battery itself will drain the battery. There is no fix for this except replacing the battery. You may also have something that is pulling power from the battery. Examples are under hood light, dome light, glove box, trunk, courtesy light, and any numbers of relays.
In front of the battery(in relay box). It's the one that says Inhibitor.
Right under the battery
How do you replace 2003 nissan maxima headlight?
The 2003 Nissan Maxima has 24 valves.
The 2003 Nissan Maxima has a V6 engine.
The 2003 Nissan Maxima has a 4-speed automatic.
The 2003 Nissan Maxima is a gas-powered vehicle.
The 2003 Nissan Maxima has double overhead cam (DOHC).
The height of the 2003 Nissan Maxima is 4 ft. 8.3 in. (56.3 in.).
The curb weight of the 2003 Nissan Maxima is 3233 lbs..
The 2003 Nissan Maxima's turning circle is 35.4 ft..
The 2003 Nissan Maxima is 15 ft. 11.5 in. (191.5 in.) long.