How to replace 2003 Subaru Legacy L fog light bulbs?
There is a single plastic fastener that holds the mud shield in
place below the bumper. Remove the fasterner by pushing it out of
the expansion clip then pull the mud shield down out of the way.
The fog light can be unplugged and the two bolts removed which will
allow you to pull the entire assembly out the front of the bumper.
The little fasterner that holds the shield in place looks like a
screw but it isn't. Just punch it out from behind and then snap it
back in place when you're finished. Once the assembly is out it's
pretty simple to unscrew the light and replace the H3 bulb.