Other mistake: Throughout the entire chase scene at the end, the vault creates sparks on the road. Yet when they get to the bridge, no sparks appear. This cannot be due to the vault being empty at this point, as the vault itself is 10 tonnes, as mentioned earlier in the film. (01:49:00)A Demon
Other mistake: In the final chase scene with the vault when Brian is in reverse and Dom is pulling, Brian stops to take out the two bikers. The vault stops too but in Dom would still be pulling it since there was no communication, plus the inertia of the vault would have dragged Brian or smashed Dom.