Continuity mistake: In the final scene Mia is driving an NSX. The aerial disappears and reappears throughout this scene. (01:34:00)
Continuity mistake: When Dom crushes Phoenix between the Camaro and Impreza, the hood of the Camaro is badly damaged and denting up. In every shot afterwards, the Camaro is just fine. (01:35:50)
Continuity mistake: Dom smashes his Charger into the side of the silver Chevrolet 4x4 and damages the front of the car, yet in all following shots, the damage has gone.
Continuity mistake: During the final chase just before everyone goes into the tunnels, Dom's Charger gets a glancing hit on its back right-hand corner, and you can see the panel damage, but later the damage disappears.
Continuity mistake: When Dom slams his black Buick Grand National into the side of the Petroleum tanker to get the coupling to break, the entire side of the car is stoved in, and the rear axle is seriously bent as evidenced by the angle of the back wheel. All subsequent shots, however, show the wheel intact and the damage to the side as slight denting.
Continuity mistake: During the start of the chase in the grey Subaru Impreza, its sidelights vary on and off.
Answer: No it doesn't ignore 2 Fast 2 Furious, Brian even references it a couple of times. In that movie, Brian was promised a 'clean slate' if he helped them out which presumably gives him the option to rejoin a law enforcement agency. That he chose not to open a garage with Roman is pretty much redundant, Brian simply got a better offer, and as he stated in Fast & Furious with his conversation with Mia, "I'm a good liar".
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