Muslims believe in the original scripture of the Bible that was revealed to Prophet Jesus through the angle Gabriel. However, they don't believe in versions of the Bible that have been altered or changed or supplemented with the writing of others.
The original message that Muslims believe in was repeatedly stated and preached by all the prophets throughout the holy books sent down to us by God, and that message was concerned with the Oneness of God. However, manipulation by political leaders and human intervention for reasons of personal gain resulted in drastic changes to the original message. Almost every decade a new version of the Bible has been rewritten. There are 86 books from the Orthodox Version, 76 books from the Charismatic Version, 73 books from the Roman Catholic Version, 66 books from the Protestant Version and many others. Even the committee that is responsible for revising the Holy Bible admits and asserts to defects and mistakes that were done when rewriting and translating the Bible. The preface of the Holy Bible stated:
Sometimes it is evident that the text has suffered in transmission, but none of the versions provides a satisfactory in restoration. Here we can only follow the best judgment of competent scholars as to the most probable reconstruction of the original text… Notes are added which indicate significant variation, additions, or omissions in the ancient authorities… Yet the King James Version has grave defects… these defects are so many and so serious as to call for the revision of English translation.
How could any human being place his trust in running his life on a distorted version of the truth? If we conduct an experiment, telling a story to a group of people and impressing upon them to convey it accurately to others, we will likely find a distorted version of that story. Now if this happens in just a few minutes, what about thousands of years of change, adjustments, and deletion of words? What would happen to the original story, and more importantly, the original message? We can only follow the true and unaltered message that comes only from God. It is only God's words and knowledge that guides us to the prosperity of life and not the opinion of an ordinary human being who is not perfect and full of mistakes.
And there are among them (the Jews) unlettered people, who know not the Book, but they trust upon false desires and they but guess. Then woe to those who write the Book with their own hands and then say, "This is from Allah," to purchase with it a little price! Woe to them for what their hands have written and woe to them for what they earn thereby. And they (Jews) say, "The Fire (of Hell) shall not touch us but for a few numbered days." Say (O Muhammad to them): "Have you taken a covenant from Allah so that Allah will not break His Covenant? Or is it that you say of Allah what you know not?
(Surah Al-Baqarah: 78-80)
Verily, those who conceal what Allah has sent down of the Book, and purchase a small gain therewith (of worldly things); they eat into their bellies nothing but fire. Allah will not speak to them on the Day of Resurrection, nor purify them, and theirs will be a painful torment. Those are they who have purchased error at the price of Guidance, and torment at the price of Forgiveness. So how bold they are (for evil deeds which will push them) to the fire. That is because Allah has sent down the Book (the Qur'an) in truth. And verily, those who disputed as regards the Book are far away in opposition.
(Surah Al-Baqarah: 174 -176)