I used these bulbs on my 4runner to add signals to the corner lights. The bulbs fit the base the way they should. I didnt know they had polarity and installed one backwards, easy fix once I realized what it was The bulbs aren't as bright as I thought they would be, might also be the 23 year old wiring supplying them juice, but either which way, they handle my needs just fine. Not sure about longevity yet, but I still have a few left over if these croak, so I'd imagine I'm good for a couple yearsSee full review