Is the driver considered responsible for the death of a person who was run over by another car, after one of the passengers in his car opened the door facing the street, which led to the deceased trying to avoid the door and colliding with the other car, knowing that the driver did not mention that his colleague was the one who opened the door?

What you have mentioned does not form the basis for a ruling. Your statement that you were the driver, and you stopped the car near the curb for the passengers to exit, and one of them opened the door facing the public street, whereupon a cyclist came and tried to avoid the door but collided with the rear of another car.

This indicates several things: 1. Your stopping the car near the curb is considered an error if the place was not designated for stopping. 2. Your friend opening the door facing the public street and attempting to exit from it is considered another error. 3. Your denial that your friend opened the door, which was the cause of the cyclist's swerving, is considered a lie and concealment of the truth, unless you are certain that the authorities would unjustly hold you responsible. 4. The cyclist colliding with the rear of another car indicates that it was not possible for the car owner to avoid what happened. And what cannot be guarded against is not subject to guarantee, and therefore, ruling that he must pay blood money (diyyah) is not correct. 5. You are not obliged to pay blood money because you are the cause, not the direct perpetrator. The jurisprudential rule states: "If the direct perpetrator and the cause converge, the ruling is attributed to the direct perpetrator." And the direct perpetrator in this incident is the cyclist himself.