i need to change my headlight but I can't seem to find out how to do it without removing the top headlight cover , I can't remove the top headlight cover because the previous owner stripped the 4 screws holding it on, anyone else know another way to get a new bulb in ?

 

take the plastic surrounds off

 

The factory headlight is a sealed beam and not that great.

What I did and would recommend for getting better/more light is replacing them with a pair of headlight housings that accept H4 headlight bulbs and then using 60/55W H4 "Xenon" bulbs. You can do this for less than $30.

Not affiliated with either seller but here are some examples:

http://www.ebay.com/itm/7X6-Chrome-Glass-Lens-Projector-Headlights-Headlamp-L-R-H4-H6052-H6054-H6014-Vf6-/390928788885?fits=Make%3AMazda%7CModel%3ARX-7&hash=item5b052bed95&vxp=mtr
http://www.ebay.com/itm/2-x-Car-H4-HID-Xenon-Halogen-White-Headlight-12V-60-55W-Halogen-Bulb-Lamp-Light-/371222544991?pt=LH_DefaultDomain_0&hash=item566e96825f

(It is typical for ebay sellers to put HID in the title/description but they are not real HID.)

 

Use the Headlight cleaning button on the switch to pop the lights up.(button above the Headlight ON/OFF switch)
take the plastic surround off..there are about 4-6 philips screws..
then you will see a silver trim ring that holds the light into the housing.
..I Normally just undo 2 screws on the bottom and lift up the trim carefully to get the light out..undo the connector from the light and replace..Test the light..Do NOT look into the light!...(you'lll see God or Ozzy Ozbourne!)
now ..do all that **** in reverse...DONE.