You will need turn signal adapters (wiring). The plastic (upper and lower) is a straight swap.
Before I sold my '03, I swapped out some '05 plastic and got to use the glove compartment. Very nice. Didn't bother with the electrically controlled lock.
I used part 5VS-82509-00-00 and replaced the one connector side with the common ends that fit those style turn signals. Happened to have some old ones and old wiring laying about...