The plastic grilles on the front doors and on the rear just pop off. Use a flat end screwdriver and gently pry them off the plastic grip holders.
Dodge spirit and Plymouth Acclaims use 5 1/4" speakers in front and rear doors. The covers pry off if done gently. The have plastic tabs holding them on. They get brittle so be careful. Just unscrew and install new speakers and snap on the covers. They sell kits a Walmart and other stores if needed for the speakers. I'm getting ready to replace the door speakers in my 94 Dodge Spirit.
If the speakers are in the door panel then you must remove the door panel to install new speakers. You can only bypass removing the door panel if the speakers are located elsewhere.
Haynes repair manual, Dodge Neon 2000 thru 2003. Book #30036
remove the door panels
6x9 same as the rear speakers
6in round
there are NO speakers in the "rear" doors of a Neon.
Front door speakers are 6x9 but after market will not fit unless you have at least a 3/4 spacer. Back door speakers are 5 1/2.
Remove the door panels and replace the speakers. They sit in baskets and are simple to replace. We have instructions at our enthusiasts forum. www.trailvoy.com
color codes for dodge ram 4 door speakers?
6x9
Pull off the door panel, unscrew the stock/old 6.5 inch speaker, disconnect the speaker wiring and connect the new speaker. Screw the speaker in the hole in the door and replace the door panel.