The Qur'an does not replace the Bible. Actually the Qur’an encourages Muslims to study and respect the Bible.
The Qur’an does not replace the Bible. It was written as a later revelation for Muslims, but it frequently affirms the Torah and the Gospels and does not forbid reading them (Sura 3:3; 2:87). God gave the Torah, the Prophets, and the Psalms as His authoritative Word, complete for their purpose and pointing to the Messiah (Deuteronomy 4:2; Psalm 22; Isaiah 53). The New Testament continues what was written in the Old Testament, showing its fulfillment in Jesus (Matthew 5:17).Reading the Bible can help Muslims understand God’s plan, the teachings of Jesus (Isa), and the hope of eternal life (Acts 17:11; John 3:16; 1 John 5:13). God’s Word endures forever, and studying it deepens understanding of His promises and salvation.
Muslims teach that the Qur'an is their holy book and that anything in contradiction to the Qur'an must be wrong or corrupted, including the Bible. However, this does not mean the Qur'an teaches that it was provided to replace the Bible. In fact, the Qur'an often speaks very highly of the Bible and its messengers.
Sura 2:87 in the Qur'an speaks of the books written by Moses, stating, "We gave Moses the Book and followed him up with a succession of messengers." Additional revelation from Allah did not replace the Torah; the Torah was affirmed as being from Allah.
Sura 3:3 teaches, "It is He Who sent down to thee (step by step), in truth, the Book, confirming what went before it; and He sent down the Law (of Moses) and the Gospel (of Jesus) before this, as a guide to mankind, and He sent down the criterion (of judgment between right and wrong)." According to the Qur'an, Allah sent the Law and the Gospels. Therefore, even the Qur'an does not replace the Bible. For Muslims, the Qur'an is considered the final revelation of Allah through the angel Gabriel to Muhammad the prophet.
Muslims do not need to fear the Bible or deny its important role in history.
Muslims should ask themselves, "Can Allah's words be replaced?" The Qur'an teaches they cannot: "Rejected were the messengers before thee: with patience and constancy they bore their rejection and their wrongs, until Our aid did reach them: there is none that can alter the words (and decrees) of Allah. Already hast thou received some account of those messengers" (Sura 6:34). The Qur'an teaches that Allah revealed the Law and Gospels (Sura 3:3). In that case, Muslims should view the Qur'an as additional revelation rather than a replacement for the Bible.
This is very important, because it shows that Muslims should study the Bible, not reject it. The Gospel of John, in particular, was written to help make known the teachings of Jesus (Isa), named as one of the many prophets in the Qur'an. A Muslim can freely read these teachings and discuss them with others to help understand God's will for his or her life. Those who do may realize there the truth about who Jesus really is — the Son of God, not a mere prophet—-and how a person can have eternal life (John 3:16) and assurance of paradise (1 John 5:13).