Today i took off my bumper all ready with the 168 bulb that i thought it took but when i opened the taillight it looked like a whole circuit board in one, is it replacable?? No its not the turn signal bulb.

 

the tail light is an array of LED's and on a board....

so you have 2 options to replace them:

1> replace the full board - I would do this if you are not electrically inclined and cant solder
2> replace the led - if you think you have some skills with the soldering iron, I would go this route as its cheaper....

Hope this helps...