Does a small fart ruin wudu?

Activities That Nullify Wudu

Several actions can invalidate wudu, including urination, defecation, passing gas, deep sleep, light bleeding (varies by madhhab), menstruation, postpartum conditions, and sexual intercourse. Wudu is commonly referred to as "partial ablution," in contrast to ghusl, which means "full ablution," involving the washing of the entire body.