A:AnswerIt’s called a wiring harness and it’s about 40$ and it makes the install easier for the tech doing the install it’s called (plug and play) have to have it for Best Buy to do the install not sure about other places
A:AnswerThis gives you a seperate fob you can use to start your car. My 2013 honda pilot key fob still works to unlock and lock it. Im not sure if its different for your car, im sure the geek squad person can tell you for sure.