2002 Fog Lamps replacement
 

Hi, I just purchased both fog lamps (after-market) for my Passat 2002. For some reason the original VW keep getting water inside, VW replaced one of them during warranty but not anymore. So I got this for a good price and plan to replace it myself. Also, I plan plan to seal them as much as possible to avoid water leaking inside

Have you had this problem?
Did you find the waytoavoid this issue?
How are they replaced? is there any on-line service manual available (free)?

Many thanks, alex1