Mazda Forum - Mazda Enthusiast Forums - How to replace headlight bulbs mazda 3 2007?

They're easily accesible from the back of the housing, at least in my 3 sedan. The h7 clips ar a little intimidating to some people but they're rather basic. Heres a reply I found in a prevuious thread. Just a tip, if you search, pretty much any question has already been asked & answered....

Definitely not necessary to remove the bumper. The washer filler and power steering resevoir are a bit in the way for good access but is still possible to replace in the car. The metal clip is released by pushing the upper part towards front of car slightly then upwards. Spring clip should then pivot out of the way towards outside of car. Make not of how the bulb is positioned when removing. You will notice on the bulb socket there is a flatened side with a little protrusion in the middle (see pic below). This protrusion needs to be placed in the 11 oclock position as if you were sitting in the drivers seat. There are two alignment tabs on the headlight body assembly that this little protrusion will fit into. Also be very carefull not to touch the glass of the bulb as the oils on your fingers will cause it to overheat and greatly shorten lifespan.