Why does C-3PO have a silver lower leg?
In Star Wars, C-3PO is a gold robot but his right leg is silver. Why is that?
Some guy is trying to use this silver leg as support to his claim that the LHC was used to change small pieces of history. A preposterous claim when the reality is that only a few people ever noticed that his lower right leg has been silver all along. When I was a kid I had a silver c3po toy. It was probably marketed as some other droid but to me c3po could any color as he, like everything else in the SW universe, appears to be pieced together from whatever worked. Not unlike his red arm in TFA. Bottom line is - it's a replacement part.
Interesting question. I encourage you to read up on it on the wookieepedia.
In short, at the end of episode 3, C3PO was dipped in gold and had his memory erased. He then served as a translation droid along side the Organa family in the senate.
Some time between then and the events in episode 4, a bomb was placed in his leg. Events unfolded that allowed the safe removal of the leg, but as he was dipped in gold specially, no gold legs were around. And time (or hard times in the Organa family) never permitted him to dip the leg.
That's the canon. But the real reason is simple. They wanted him to look like he had some history. Like a scar on the face.
Where on wookiepedia does it say anything about the bomb? He was gold at the start of Episode 3, so your answer is also confusing.
@RedCaio There was no "new canon" when I created this answer 5 years ago. And Wookiepedia did back up my answer then, because that's where I got the info from in the first place.
@DampeS8N: Well, at any rate, Wookieepedia is not a primary source unless it gives a reference for the information. And the fact it has changed in the meantime shows why it's not a good source. It can be a starting point.