That was the first thing I changed when I bought my 500T.

I used these for the running lights and they did require a resistor in paralleled to the bulb. Easy to do for the running lights.

I used these for the fog lights. They kinda suck as I had to pull the bumper cover to change the bulbs. That's why I was installing them though. Should never have to change them again. They did not require a resistor. No codes or fault indicators.

Lastly, I used these for the head lights. They also didn't require a resistor. Just plug and play. The light pattern was the same and the light output was increased. They certainly don't match HIDs but they're bright enough for me.

Now all my front lights match in color and shouldn't have to be changed again for quite some time.