Contradiction with John 18:15-17
This verse shows Nicodemus did not defend Jesus publicly, contradicting his defense in John 7:50.
John 18:15-17: And Simon Peter followed Jesus, and [so did] another disciple: that disciple was known unto the high priest, and went in with Jesus into the palace of the high priest.
Contradiction with Luke 23:50-53
Joseph of Arimathea, not Nicodemus, boldly asks for Jesus' body, contrasting Nicodemus’ covert actions.
Luke 23:50-53: And, behold, [there was] a man named Joseph, a counsellor; [and he was] a good man, and a just:
Contradiction with John 19:38-39
Nicodemus comes secretly at night to Jesus, contradicting the courage implied in John 7:50.
John 19:38-39: And after this Joseph of Arimathaea, being a disciple of Jesus, but secretly for fear of the Jews, besought Pilate that he might take away the body of Jesus: and Pilate gave [him] leave. He came therefore, and took the body of Jesus.