While Shane is searching for the Navigator after it goes missing, he says he is looking for a black Navigator, but the Navigator is actually blue.
When Danni tells Dutch that Margos Dezerian (the Armenian killer) spoke to her, the boom mic is visible momentarily as Dutch walks up the stairs.
Danni refers to Margos Dezerian (the Armenian killer) as a "Balkan freak". Armenia is in the Caucasus not the Balkans.
When detective Mackey is placing the two bricks of cocaine into his bag after the Armenian drug dealer raid, he says "I don't want my kids going through that UC Northridge hell." The college in Northridge is part of the California State University system, not the University of California system. So it is "Cal State Northridge", not "UC Northridge." A streetwise experienced detective in Los Angeles like Mackey would certainly not make that mistake.