One of the major differences between the 2002-2004 and 2005-2006 CR-Vs is the size of the wheels.
The 2005-2006 got bigger wheels to make room for bigger brake discs.
The front bumper is different, as is the front grill.
Along with the changes to the bumper the headlights were also changed. The headlights went from a single headlight bulb that is both high and low beams in the 2002-2004, to two headlight bulbs in the 2005-2006 with separate high and low beam bulbs. And a different wiring harnesses for the headlights, too. Physically, I have no idea of they are interchangeable, with or without minor modifications.
Use etrailer.com for the tow hitch and wiring harness.
https://www.carid.com/2006-honda-cr-v-bull-bars/ for front bars. After some web searching I don't see that anyone makes a full front guard that protects the headlights anymore, only "bull bars".
For headunits, speakers, and other audio gear I'd suggest starting at crutchfield.com. They have a 'what fits my vehicle' function that shows you what will fit your CR-V. They also sell wiring harnesses and mounting kits for installing aftermarket audio equipment.
The 2005-2006 got bigger wheels to make room for bigger brake discs.
The front bumper is different, as is the front grill.
Along with the changes to the bumper the headlights were also changed. The headlights went from a single headlight bulb that is both high and low beams in the 2002-2004, to two headlight bulbs in the 2005-2006 with separate high and low beam bulbs. And a different wiring harnesses for the headlights, too. Physically, I have no idea of they are interchangeable, with or without minor modifications.
Use etrailer.com for the tow hitch and wiring harness.
https://www.carid.com/2006-honda-cr-v-bull-bars/ for front bars. After some web searching I don't see that anyone makes a full front guard that protects the headlights anymore, only "bull bars".
For headunits, speakers, and other audio gear I'd suggest starting at crutchfield.com. They have a 'what fits my vehicle' function that shows you what will fit your CR-V. They also sell wiring harnesses and mounting kits for installing aftermarket audio equipment.