Muslims respect and revere Jesus (peace be upon him). They consider him one of the greatest of God’s messengers to mankind. The Quran confirms his virgin birth, and a chapter of the Quran is entitled ‘Maryam’ (Mary). The Quran describes the birth of Jesus as follows:
(Remember) when the angels said, “O Mary, God gives you good news of a word from Him (God), whose name is the Messiah Jesus, son of Mary, revered in this world and the Hereafter, and one of those brought near (to God). He will speak to the people from his cradle and as a man, and he is of the righteous.” She said, “My Lord, how can I have a child when no mortal has touched me?” He said, “So (it will be). God creates what He wills. If He decrees a thing, He says to it only, ‘Be!’ and it is. ~ Quran, 3:45-47
Jesus was born miraculously by the command of God, the same command that had brought Adam into being with neither a father nor a mother. God has said:
The case of Jesus with God is like the case of Adam. He created him from dust, and then He said to him, “Be!” and he came into being. ~ Qur’an 3:59
During his prophetic mission, Jesus performed many miracles. God tells us that Jesus said:
“I have come to you with a sign from your Lord. I make for you the shape of a bird out of clay, I breathe into it, and it becomes a bird by God’s permission. I heal the blind from birth and the leper. And I bring the dead to life by God’s permission. And I tell you what you eat and what you store in your houses….” Qur’an 3:49
“So she (Mary) pointed to him. They said, “How can we speak to one who is in the cradle a child(Jesus)?”
(Jesus) said, “Indeed, I am the servant of Allah . He has given me the Scripture and made me a prophet.”
~ Qur’an 3:49
Some of his mission is (1) to advocate the worship of One True God,
“Indeed, Allah is my Lord and your Lord, so worship Him. That is the straight path.” ~ Qur’an 3:51
“They have certainly disbelieved who say, ” Allah is the Messiah, the son of Mary” while the Messiah has said, “O Children of Israel, worship Allah , my Lord and your Lord.” Indeed, he who associates others with Allah – Allah has forbidden him Paradise, and his refuge is the Fire. And there are not for the wrongdoers any helpers.” ~ Qur’an 5:72
“And [mention] when Jesus, the son of Mary, said, “O children of Israel, indeed I am the messenger of Allah to you confirming what came before me of the Torah and bringing good tidings of a messenger to come after me, whose name is Ahmad.” But when he came to them with clear evidences, they said, “This is obvious magic.” ~ Qur’an 61:6
“And [I have come] confirming what was before me of the Torah and to make lawful for you some of what was forbidden to you. And I have come to you with a sign from your Lord, so fear Allah and obey me.” ~ Qur’an 3:50
Muslims believe that Jesus was not crucified. It was the plan of Jesus’ enemies to crucify him, but God saved him and raised him up to Him. And the likeness of Jesus was put over another man. Jesus’ enemies took this man and crucified him, thinking that he was Jesus. God has said:
…They said, “We killed the Messiah Jesus, son of Mary, the messenger of God.” They did not kill him, nor did they crucify him, but the likeness of him was put on another man (and they killed that man)… ~ Qur’an 4:157
Neither Muhammad nor Jesus came to change the basic doctrine of the belief in one God, brought by earlier prophets, but rather to confirm and renew it.
God is not a trinity,
They have certainly disbelieved who say, ” Allah is the third of three.” And there is no god except one God. And if they do not desist from what they are saying, there will surely afflict the disbelievers among them a painful punishment.
So will they not repent to Allah and seek His forgiveness? And Allah is Forgiving and Merciful.
The Messiah, son of Mary, was not but a messenger; [other] messengers have passed on before him. And his mother was a supporter of truth. They both used to eat food. Look how We make clear to them the signs; then look how they are deluded. ~ Qur’an 5:73-75
Jesus on the Day of Judgement,
And [beware the Day] when Allah will say, “O Jesus, Son of Mary, did you say to the people, ‘Take me and my mother as deities besides Allah ?'” He will say, “Exalted are You! It was not for me to say that to which I have no right. If I had said it, You would have known it. You know what is within myself, and I do not know what is within Yourself. Indeed, it is You who is Knower of the unseen.
I said not to them except what You commanded me – to worship Allah , my Lord and your Lord. And I was a witness over them as long as I was among them; but when You took me up, You were the Observer over them, and You are, over all things, Witness. ~ Qur’an 5:116-117
God has NO son (or Son),
“And they say, “The Most Merciful has taken [for Himself] a son.”
You have done an atrocious thing.
The heavens almost rupture therefrom and the earth splits open and the mountains collapse in devastation
That they attribute to the Most Merciful a son.
And it is not appropriate for the Most Merciful that He should take a son.
There is no one in the heavens and earth but that he comes to the Most Merciful as a servant.” ~ Qur’an 19:88-93
Source: http://www.islam-guide.com/frm-ch3-10.htm and other texts.