I have one burned out passing lamp on my '11 FLHTK.

Is it a standard bulb I can get at at AutoZone or O'Riellys?

 

Yes you can grab them at an auto parts store. I'd replace both at the same time, perhaps even go with a 55 watt or something different than the 35 watt stock bulbs.

 

I replaced both of mine with cryon LEDs....much brighter then anything else,

 

Take the failed one with you, to make sure you get the correct fitting. If you're tempted to buy LED make sure they are not longer than your stock bulb. Cheap LEDs are longer than stock bulbs and don't focus correctly, that is why some vehicles with very bright lights cause dazzle, because they are using crap aftermarket lights!

 

Ok thanks