Does anyone know the speaker size for the front door of our cars? I checked the NX and the sentra of the same year and they are 4x6 and 5 1/4 respectively. The 4x6 and 6 inch do not work. I am assuming they are a 6.5 or 6.5S. Thanks for any help.

pretty sure the factory size is 6x4"

many people fit 6", and even 6.5" is not uncommon (some trimming of door card required)

depending on the physical shape of the speaker you may need to use a spacer and/or drill an extra hole...

I have Alpine type R's 6.5" up front and required some door card trimming but nothing major. Taking it apart gives you a chance to sound proof the doors while your at it to eliminate some road noise. The rears are 4X6 i think, i found Infinities that fit perfect no probs.