Vehicles have complex rules, depending on various factors. My following comments apply to MOST situations.
Assuming that vehicle is used in the US, the vehicle you gave details DOES qualify. There is no need to amend.
But then you mentioned another vehicle that was less than 50% business use. That would NOT qualify because it is 50% or less.
Vehicles more than 50% can use "accelerated" depreciation, such as Bonus depreciation and/or 200%DB.
Vehicles 50% or less can only use Straight-Line depreciation, and can NOT use Bonus.
If a vehicle starts off with over 50% then drops to 50% or less in a following year, then you generally need to "recapture" the accelerated depreciation. That means you (1) look at how much prior depreciation was taken (including any Bonus depreciation), (2) manually calculate what the prior depreciation would have been if you had only used Straight Line depreciation and then (3) enter the difference on the very bottom of Form 4797 AND enter that excess difference as income on tax form (Schedule E for rentals or Schedule C for a business).
