I found this thread when I needed some help searching for headlight bulb replacement info. I wrote this how-to guide that has pictures of the little headlight clips, part numbers, and etc. I just thought I'd leave a link here for anyone else that ends up here: Mazda 3 Headlight Bulb Replacement
I have a 2011 Mazda 3 w/ technology package. The auto on/off headlights are not working. Anyone have any ideas on a cause/fix for this? When I start my car in my dark garage the lights come on immediately. They will never switch off even in bright sunlight after that. If I start the car in bright sunlight the lights are off. The Socket is not made for the H7 bulb but it will work on it, I couldn't locate a socket for the H7 bulb so I used this one, I like that the wires are a bigger guage than the factory, less resistance in the wires, and the wires are copper instead of aluminum or some other cheap material.