S3X may refer to:
s3X, Internet slang for sex S3X, a concept car that lead to the Chevrolet Captiva Synare S3X, electronic drum equipment Sturmey-Archer S3X, a cycle gear hub "S3X", a 2009 TV episode of Brothers & Sisters season 3 S3X, the Tesla model range scheme, an Easter eggs in Tesla products
See also Sex (disambiguation)