I did search but couldn't find the answer. Anyone?

p/N: 194

Available though Napa...

http://altrom.com/cgi-bin/altapp.sh?...0000::C:3348:N

Porsche part# 999 631 032 90

Thanks for all the replies. So 194 is the bulb type if I want to get some aftermarket LED bulb?

Yes. My entire vehicle utilizes LED bulbs except for headlights/brake lights. I used these for parking lights: http://www.virtualvillage.com/Image....10-481/002.jpg and there are a couple good side marker options here: http://autolumination.com/194.htm

I recommend "Halo" brand LEDS, they are made in japan and last a lifetime and do not get weak as time passes.