Late in the movie, Vanessa is shown in front of Freddy Fazbear's Pizza. Mike's car is not in the parking lot. When she later pulls up with Mike, it's there.
When Mike goes to throw the bucket of water on the floor to electrocute Freddy and Bonnie, water is already on the floor.
Abs's green crayon magically heals and breaks again between camera changes.
When Abby is seen coloring one of her pictures, the markers she is using are the Mondo Llama brand from Target, which did not launch until circa 2021. Due to this they wouldn't have existed yet for the film.
When Aunt Jane comes to Mike's house she is parked right behind his car. She never leaves and Mike somehow leaves without her car moved.
In the opening scene, the security guard is seen removing long bolts from the vent duct grating. When he exits the vent, he is able to do so without taking out any bolts. Apparently, the vent exit has a "pop off" grate.
The taxi that Abby and Freddy head to the restaurant in is a Honda Odyssey rather than the Isuzu Oasis.
One arcade cabinet seen in the arcade is modern day redemption game "Deep Sea Treasures" by ICE Games. This game was created in the 2010s.
(22 min; 1 hr, 32 min) An arcade cabinet for the 1995 Atari game "Area 51" is seen in the training video, which seems too advanced for an arcade machine in the 1980s.
Innovative Concepts in Entertainment's Cyclone is regularly seen in Freddy Fazbear's Pizza, which feels too outdated since Cyclone was released in 1995.
Several contemporary cars can be seen throughout the movie namely an overhead shot of Mike driving at the diner. At the diner a red sedan and a white SUV drive by as seen in the window the former a 2017-2018 Hyundai Elantra and the latter a 2007-2014 Ford Expedition. Mike also drives a 2001 Honda Accord which would have been brand new when the film takes place however it is presented as a 22-year-old beater it is real life.
The version of "Talking In Your Sleep" played in the movie was released In 2010 while the movie takes place in 2000.