Is it possible to change the factory default keypad access code in a 2007 Ford 500?

Dear Tennisshoes: Many thanks for the quick reply! I suspected that would be the case. The backstory on this is that I had called a Ford dealership to get pricing about replacing the module. The service person stated it would be about $600, which would cover the cost of the module, the labor involved and the cost of replacing the keypads on the doors themselves. I could buy into the the cost and labor associated with replacing the module, but for the life of me could not fathom why the need to replace the door keypads. To me, the keypads would function as a peripheral device (like a computer keyboard, and would connect to the module. I don't understand why there would be a need for a peripheral device to be somehow so functionally integrated with a central processor that it also needed to be replaced. To me the need to replace the keypads seemed to be a lot of hooey. So I decided to reach out to the Car Guru people to get some input!!!! Thanks again for your help Cajunmccarthy

Dear tennis shoes: That is a tremendous help! The keypads are fine themselves. I think that the dealership is just trying to make money off of a female college student (my daughter) who, to them, is clueless about cars. Although I am fairly knowledgable about older (pre-1990) cars, I am not familiar where the rear package tray is located in the trunk. I am guessing it is on located against one of the side walls of the trunk area? Once I find it, I should be able to make the replacement with my current skillset though. Thanks again!