The Louisiana license plate from the stolen black Volvo V70 driven by the kidnapper switches from U9K463 to 9143T4.
Just before running out of gas, Karla rams the driver side door of the black Volvo, causing clearly visible damage. After cutting to a shot of her empty fuel gauge, the scene cuts back to a flash of the Volvo with an undamaged door.
After hitting the Volvo for the first time, there's severe damage to the Volvo's hood and other parts of the front. Two minutes later, there's noticeably less damage.
Right after the black Volvo runs over the blonde woman, it is shown that another car hits the red minivan and the driver's side airbag gets deployed, saving Karla. Seconds later, when Karla continues the chase, the airbags have vanished.
Early in the film, Halle Berry drives a older model (roughly 2004) Chrysler Town and Country, distinguishable by the trim piece on the front grill. In the early scenes (for example at 10:13, the top part of that chrome-looking trim dips down in the center to accommodate a Chrysler logo. In virtually if not all of the chase/wreck scenes, that grill doesn't have that dip in the top center, indicating it's a newer model - but not much newer.
A 911 call is placed from a landline cordless phone, the phone number is associated with a stationary address. Authorities know where the house is based on this phone number, and the house doesn't move. The cordless phone has a range of maybe 50 ft. But the 911 dispatcher states "we will triangulate on your location" despite Karla knowing the address. Authorities only need to triangulate on cell phones which are mobile, using 3 cell towers to find their location.
One of only two states that are not divided into counties, Louisiana is made up of parishes (functionally identical to other states' counties). For the most part, this film gets this fact correct, i.e. the numerous references to Jefferson Parish. However, during the final scene of the film, one of the police cars is clearly and inappropriately marked "County Sheriff".
In the model of Chrysler Town & Country minivan that Karla is driving it shows her releasing the parking brake by hand when she has the kidnapper body-locked in the side door. This model of vehicle does not have a hand brake, it has a foot brake which can only be engaged on or off by the pedal left of the gas and brake pedal in the driver's floorboard. Her releasing the brake by hand in this vehicle is impossible.
Several times throughout the film, Karla's minivan is depicted accelerating far more quickly than that type of vehicle is capable of.
In a fight scene, Karla easily grabs and holds onto the barrel of a shotgun seconds after it was fired by Terry. However, metal barrels of firearms heat up after being discharged, so grabbing it would hurt Karla's hands. However, Terry had already held his shotgun by the barrel immediately after discharging both barrels, so the heat obviously dissipates fast enough to make this a non-issue.
During the climax, the kidnappers' attack dog - who was moments ago on the dock just above the characters, hunting them - disappears without explanation and is never seen or mentioned again. However, the movie blatantly shows the dog getting shot by the big woman as she falls into the water.
Obvious male stunt double wearing a long blonde wig doubling for the woman hit by the Volvo near the end of the last chase sequence.
When Karla rings the police from the kidnappers house they say the response time is between 7 and 15 minutes. When Karla dispatches the last of the kidnappers all the police arrive at the same time. Many cars and 1 helicopter. The helicopter should have gotten there much sooner.
Karla drove what appears to be an early-2010s model Chrysler Town and Country minivan while the antagonists drove a mid-1980s Ford Mustang GT. During chases, the film implies the Mustang is faster although in reality both cars have about the same performance, and given its age and apparent mediocre maintenance, the minivan likely accelerates considerably faster.
The antagonists' 1986 Ford Mustang is consistently referred to as "green", despite its shade being much closer to a blue-gray.
The A&P supermarket chain is mentioned in the dialog, but by the time the film was released in 2017 the company had gone out of business.
After Karla's minivan deploys the front airbags in the accident with the black Volvo, Karla restarts the vehicle and continues the chase. Vehicles have a built in fail-safe that renders them unable to restart after an airbag deploys.
As the motorcycle officer pulls up beside Karla's van, he should've noticed the Mustang has no rear license plate, and moved to pull them over as well.