Not sure about the 99 maxima but I broke into my 98 with the keys in the trunk. My make shift key was a 3ft long metal rod (about the diameter of a pen) that I found laying around. I pulled on the front door from the end furthest from the hinges and stuck the rod through the weather stripping and managed to "hook" the inside lock. I was able to open my trunk at this point, and silence the alarm. No damage was done to the car.