There are a few sexual references.

While receiving a massage, the top of a man's hairy bare bottom is visible, but is not the focal point.

Partial nudity of the new wife (topless) during the wedding night, showing her breasts for a few seconds.

One brief sex scene. No nudity, but the movement is very obvious.

A woman makes a hand gesture implying her husband has a large penis; this may fly over some viewers' heads.

The famous "mattresses" montage sequence features various newspapers with real-life photographs of killings of gangsters and mobsters. Although they a quite brief and relatively unimportant to the plot, the idea that those are real events and not pictures taken for the film might be a bit disturbing.

The film opens on a man describing a violent attack on his daughter and the injuries she received.

Sonny Corleone beats up his sisters man Carlo in the street. He even bites his hand and throws a trash can over him.

A gangster locks a revolving door and traps & shoots a man through a glass window multiple times.

A man is shot four times by another man through a glass door, blood on the glass is seen. A man and woman in bed are shot to death with machine guns, brief but a bit bloody.

A man is stabbed in the hand and then garroted, a trickle of blood is seen on his hand. Lasts for roughly 18 seconds as he struggles before the scene cuts.

A man is shot in the eye, he slumps down dead. We see his glasses crack, and blood streaming for a second. Not too graphic.

A man shoots two men with some blood.

A man is shot five times in the back (from a distance).

A man is shot dead in a car (not visible).

Two uses of the word "Vaff*nculo", Italian for "F*ck you".

7 uses of "goddamn".

Finnochio (italian for "faggot") is used.

One use of the N word.

9 uses of "hell"

4 uses of "God" in vain.

2 uses of "Jesus Christ" in vain.

Some of the movie's plot is centered around drugs and drug dealing. But no actual activity is shown with drugs

The issue of child drug use is briefly discussed, and the Commission (the Sicilian American Mafia's top organization) decides not to deal in drugs near schools to avoid it.

Some casual smoking and drinking.

A minor theme of drug trafficking is present in the movie. It is presented as a lucrative, but dirty, dangerous business.

The depiction of domestic violence in the movie is very intense and can be upsetting.

The overall tone of the movie is very dark and depressing, especially during the second half.

Multiple major character deaths that may upset some viewers.

Although almost every character is a criminal some deaths may still be emotional.

Michael happens to see a gangster out of nowhere when he is about to go for a ride with his girlfriend, he suspects he put a bomb in her car, he yells at her in Italian to get out of the car and it explodes.

Mild/Moderate for neurodivergent viewers.

Some of the assassinations are intense, the tollbooth and revolving-door shootings especially.