They are not. The housing lock & twist mechanism is different. I also made this mistake because they look the same size but they won't lock in place. 9005 HB3 all the way.Is a 9005 bulb the same as an H13 bulb? I was thinking of going LED, but Xenon bulbs at 4,000 Kelvin are brighter than any LED replacement bulb and the logical choice when looking for greater night driving visibility.