https://www.nfsaddons.com/downloads/nfshs/cars/astonmartin/430/aston-martin-aston-martin-vanquish-v12.html
Upgrading the car to level 2 or 3 causes the game to bug out when starting a race.
It can be fixed by changing the "Gradient understeer" in the "Steering" tab from 0.000000 to 0.999789.
Can anyone please fix the download file so others don't encounter the same error?