When Red give johnny the Subaru to fix up to race, it is the 02-03 "bug-eye" WRX body style. When the car is all done it is an 06-07 body style STI.
When the final race starts, the Subaru is to the right of the Skyline. Just after the start, the two cars switch sides.
When Johnny trains on the go-kart round course, he starts out without, but finishes with yellow gloves.
At the beginning of the movie, when Johnny Wayne (Clint Browning) shocks with Kelly fathers car with his Mazda, the car first, starts to go of the road and then when they shock it miraculous appears in the middle of the road all broken, with no one inside.
At the first race, he is driving a BMW 525i but when it cuts to his pedals and the dashboard, they are out of a Honda Civic Si.
During the first two minutes of the film, it takes place in 2003. The Mazdaspeed 3 came out in 2007.