Continuity mistake: The colors of the lightbar on the ambulance stolen by Agent Carlin keep changing. Sometimes they are red and clear, other times they are red and blue (which wouldn't be allowed in Louisiana - blue is reserved for law enforcement).
Continuity mistake: The rig Carlin is holding repeatedly switches between his left and right hand. (01:06:25 - 01:07:25)
Continuity mistake: When Denzel Washington is underneath the bridge, he uses his left hand to swipe the substance, while Val Kilmer holds his right hand. However, in the next shot, he sniffs his right hand to determine what the substance is, while his left hand appears to be in his pocket.
Factual error: The stolen ambulance had windows on both the driver and passenger sides of the patient compartment. Ambulances don't have windows on the driver's side, and rarely have them on the passenger side, since these walls are used for cabinets.
Factual error: When giving her phone number to the ATF, Claire says 877-504-****, She meant to say 504-877-**** because 504 is the New Orleans area code. Even though 877 is a legitimate are code, it's used for free calls and why would Claire have an 877 area code at her residence? Considering the exchange was 504, she probably just jumbled the phone # that should've been 504-877-****. The same phone area code Agent Carlin leaves on Claire's answering machine.
Suggested correction: The number is an easter egg and if you look it up, it's a number reserved by ABC/Disney specifically for TV and films: 877-504-8423.
Continuity mistake: When investigating Claire's apartment Doug closes the bedroom door to reveal the mural. When listening to the answerphone the door is closed. Doug makes a note, next shot both doors are wide open.
Plot hole: Just before the bomb explodes at the beginning of the movie, the guard is looking for the car playing 'don't worry baby' on it's stereo. In the final timeline the disaster has been averted, the bomb having gone off, and the ferry docked. After this, when Carlin is in the car, the same song is playing, but the bomb was set to a timer.
Suggested correction: That's why the movie is called Deja Vu and thats why Carlin gives the girl such a strange look. The song triggers a feeling of Deja Vu for him and it almost feels to him that he knows her. Besides, a different station could have been playing the song.
Suggested correction: The first time it plays comes off the radio. The second time we hear it mid-play. It could have come from a different station, the same station could have played it again later, or a CD or cassette being played in the car.
Continuity mistake: The car's inspection certificate is dated 07 2006, at the end of the movie when they drive off it's 08 2006. (00:06:28 - 01:57:57)
