difficulty rating: 1-10 is 1
cost: $9.99
tools needed: none
I took a pair of LED sidemarker wedge bulbs from my Jetta to see how the looked on the Porsche.
First, Pull out the side marker, pretty easy.

twist the housing off...

pull out the halogen...

put the LED in, pretty easy...

reinstall the housing and turn it on, pretty cool just like xenon...

only one problem, check out bulb indicator...

PEPBOYS to the rescue, they can be purchased here too: PilotAutomotive.com : Product : LED Indicator bulbs I ran and got a set of these, surprisingly no indicator bulb out...

here is a close up of the bulb I purchased...

reinstall and wow...

matches better than the other brand and no errors, it also has two brightness levels, when you turn the lights on or unlock they are super bright. Ater you turn the car off with the come home feature they are dim...

matches xenons perfect, easy install, get it now, go to your local auto store.

UPDATE:UPDATE:UPDATE:UPDATE:
After a few weeks driving around, occasionally the "check right side marker/ indicator" comes on. It automatically goes away after a second. It gets a little annoying because it is intermittent. You can add a 10W 100ohm resistor to the right FRONT side to avoid this.

 

Your car is all xenon white now You haven't received any errors with the LED replacements?

 

there was an intermittent fault, it does not come on all the time, you can add a resistor if necessary

 

I'm not crazy about the blueish side markers. It's a little 'fast and furious' for my taste. I wouldn't mind an orange LED array. Do they make those?

 

its not blue...its just LED white...which gives off a blueish hue

 

There is a blue bulb which I currently use that gives out white light. No error whatsoever. Its from PIAA.

 

correct, the color is bright white, it doesnt look as blue in person.

 

This would be my prefered solution. Not only do the use of LEDs create false bulb warnings, but if the LED array does fail, there will be no warning. I like the fact that my car alerts me to bulbs that are out. In 20,000 miles, It's done it's job twice already.

 

You've had two bulbs go out in 20k miles? That sounds a bit frequent...

 

Yeah, no kidding. And both were brake lights. I wonder why. Does Porsche install cheap bulbs?