Gilbert Gottfried stated he and Eddie Murphy improvised their dialogue after Axel brings up Sidney Bernstein's parking violations.

This is the first film Eddie Murphy wrote or co-wrote.

According to the DVD documentary, "Paramount" originally wanted to produce a TV series of "Beverly Hills Cop" after the success of the first film. However, Eddie Murphy did not want to go back to television, so a sequel was made instead.

Chris Rock makes an appearance as the valet at the Playboy Mansion who complains about Axel bringing in a cement truck. This is his first role on the big screen; Rock was featured in an HBO comedy special (which featured aspiring comedians e.g. Robert Townsend, Marsha Warfield) which was produced by Eddie Murphy and his childhood friend Clint Smith.

Just before the final gun battle, Rosewood is seen pulling out guns from an arsenal in his trunk. This is a nod to co-producer Don Simpson. According to Judge Reinhold in the 'making of' documentary for the first film, he recalls that the first time he met Simpson, the producer showed off his collection of guns in the trunk of his car.

Continuity

In the opening sequence, the limo in which Karla and the robbers arrive in is seen having two different license plates. In the first shot, the front plate reads 'DENT', but as the scene progresses, the plate simply says '77'.

Axel shoots a hole through three video screens at the shooting range, but those holes have disappeared in future shots.

When the cop car is taking a sharp left turn during a chase, the red light falls from the roof and hangs from a cable. The passenger in the car picks it up half way and in the very next shot it is on the roof perfectly in place. Also, the same shot (of the unmarked police car taking a sharp turn with the red light dangling on its wire) is used again during a later chase.

When Axel jumps up and grabs on to the cement truck that Rosewood has commandeered, his pistol can be seen falling out of the back of his jeans. He later uses this same weapon.

When Foley decides to turn around to check out the house, there are cars visible behind him. When he makes his U turn, there are no cars on the road.



Factual errors

Using Super Glue fumes to develop fingerprints creates a white fingerprint, not a black one.

The Camaro sitting in front of the Gun Club is an '82 or newer Z28. The Camaro at the Club during the shootout is an older model Z28 (circa 1978).

At the Beverly Hills Gun Club, Foley walks in to an active gun range firing line without eye or ear protection. Also, Fielding, who is a firearm instructor, takes his ear protection off when talking to Foley. At any gun range, anyone who attempts to enter an active firing line without eye or ear protection would not be allowed in, and those on the firing line with eye and ear protection are not allowed to remove them until they leave.

At one point Murphy fires his pistol with the slide locked back, which is impossible.

In the scene at Rosewood's apartment, when Axel is using the super glue on the match book, Axel begins humming a song. Taggart asks what song it is and Rosewood shouts "The Dating Game." And Axel says "Yeah." And then all 3 begin to hum. The song is NOT the Dating Game theme. It is actually the song "Spanish Flea" by Herb Alpert & The Tijuana Brass. Both are similar because the game show and the song: are instrumental, came out in the 60s and rely heavily upon trumpets.



Incorrectly regarded as goofs

During the first jewelry robbery they force an employee to lock the front door. After the robbery Karla seemingly walks right out the door without unlocking it. However, right after she shoots down the chandelier and turns towards the door at 00:02:42, there are two more shots, and a gun flame visible; she shoots out the lock.

It is revealed Dent is committing the Alphabet Crimes to make money for an arms deal. So why is he making major contributions to charity, as he claims at the party at the Playboy Mansion? Because keeping a good face for the public makes it less likely people will think he's a criminal/smuggler.



Revealing mistakes

When Foley picks up Bogomil's shoe, the exact area where it had been standing is perfectly clean, even though its sole is dirty. The soil has been poured over the shoes on the floor.

When Axel, Rosewood and Taggart are running the matchbox's fingerprint through the computer downtown, it identifies the print as belonging to Cain and prints out his dossier. Taggart takes the printout and read aloud "Charles Cain... used to be Charles Campos". If you look at the dossier carefully, it only identifies him as "Charles Campos" and there is no reference or mention to his alias as "Charles Cain" anywhere on the printout.

During the scene where Axel first visits the gun club, it is daytime. Out the window of the scene in the office where Dent and Cain are discussing killing Foley, you can see past the bushes that it is dark outside, and a daylight balanced light is providing the "sun" beam through the window.

When Axel bends down behind a car at the oil fields to check out the color of the dirt, you can see it is obviously spread around just around the area behind the car. No where else in the parking lot is there red dirt.

Daylight visible through windows in various "night" scenes.



Miscellaneous

Although the story takes place over a number of days, it's obvious that the three establishing shots of the exterior of the Beverly Hills Police Department building (at about 00:09:17, 01:02:05, and 01:36:35) were all shot at the same time, as the same man is leaning on the sign, the same police officers are exiting the building, the same civilian is entering the building, and the same man is cleaning the sidewalk.

Murphy says a villain, "heists some bank, heists some jewelry". Heist is a noun. He also refers to "Costa Rico". This is obviously a mix-up of Costa Rica and Puerto Rico. These vocabulary issues are reminiscent of when he referred to espresso as "expresso" in the previous film.

As the first robbery begins, one of the robbers sprays a security camera in the lobby before entering the store. However, after they enter the store, no activity takes place in the lobby, and only Karla exits that way. Thus, spraying the camera served no purpose.

When Foley calls the hospital where Bogomil is when he first hears he's been shot, Bogomil's daughter answers the phone. When it cuts to the hospital room, Rosewood and Taggart are both there along with another officer, none of whom bothered to answer the phone instead of letting the grieving daughter cross the room to get it.

When Axel and Rosewood are in pursuit of the armored vehicle and come to a stop at a traffic jam, the street lights can be seen to carry on moving on the windscreen.



Anachronisms

When Freidman (Paul Reiser) answers the ringing phone in Inspector Todd's office, no line on the push button multi-line phone was illuminated.



Audio/visual unsynchronized

At the gun club, when Axel is offering his grooming services to Karla Fry, she is shown firing a revolver. But the sound effects of ejected shells hitting the floor after each shot can be heard. Revolvers don't eject their shells.

Before he is shot, Bogomil is seen leaving police headquarters in an Oldsmobile Cutlass Ciera, manufactured by General Motors. When he gets in and starts the engine, the cranking sound is that of a Chrysler product.



Crew or equipment visible

While Foley is floating in the swimming pool talking to his detective buddies, film crew and lighting can be seen in the reflection of his sunglasses in the close-up shots.

In several scenes where Axel wears his sunglasses, crew and camera are reflected.

During the scene with Rosewood driving fast on the way to the depository and during POV shot looking out of the front windshield, a camera crane is visible shooting the scene from a different angle.



Plot holes

The Captain gets chewed out by the Police Chief for involving the FBI in solving "The Alphabet Crimes." But the Diamond Store robbery is the "A" crime; i.e. the first and only Crime. How does anyone know (at this point in the movie) that there are going to be further "Alphabet Crimes"?

When Axel calls Jan from Sidney Bernstein's office, she mentions that her dad was up and around. If that was the case, why didn't Axel, Taggart and Rosewood just go to him to find out what he knew and therefore could have captured Dent & company even before they could hold up the race track.

Before the racetrack robbery Jan says that her dad is up and about. Not only should Foley have called him - a close friend - regarding his ordeal, but he should have asked him about the red mud.

When meeting Chief Lutz, Axel adopts a Jamaican accent midway through a sentence. Neither the chief nor his assistant show any suspicion towards this behavior.

When attending the crash site immediately after the nightclub shooting a cup of coffee appears out of nowhere in Billy's hand.



Boom mic visible

In the oil field at the end of the movie, Axel is bent down on the side of the black limo. As he picks up the dirt you can see the reflection of a boom mic in the bottom half of the limo.



Character error

At the gun club, Foley goes onto the shooting range to find Russ Fielding. Fielding is showing a woman how to shoot but she is not even close to holding the firearm properly. A firearms instructor like Fielding would know this and correct it, but he doesn't do so.

When Taggart tries chasing the cement truck on foot, the brake lights of the truck illuminate as it turns the corner. Later, during the chase, Axel asks Billy if the brakes work, and he replies saying that he hasn't tried the brakes yet.

[1:04:35]Taggart shouts to Billy Rosewood, "the light was red!". It's legal for police to run a red light when they are code 3 (lights & siren). But he has nothing to say about all the hit-and-runs that Billy commits.

At around the 27:00 mark, Foley identifies himself to the construction foreman and the crew as the "Beverly Hills Building inspector." A minute later, he calls himself the "Beverly Hills Building Investigator."