I replaced spark plugs. And also front windshield washer pump. Didn't remove entire front but squeezed my hand behind bumper after removing couple of screws and turning wheels all the way left. It is a 2008 GS. New plugs are bosh platinum.
Well a lot has change since 20 years ago. But will try to look for NGK's around same price tag. I dont think i have skyactive on my 2008 mazda 5 though.