Sure it does. But you still have to recapture depreciation whenever you dispose of the vehicle. It's not worth it for the most part, because when you recapture that depreciation that too generally doesn't make any difference. Even with the recaptured depreciation you're still gonna sell/trade-in the vehicle at a loss. But only get to deduct the business use portion of the loss. If you're driving less than 10% business miles a year, it's a whole lotta paperwork for no gain.
Remember, that 50% special depreciation allowance is not a permanent deduction by any stretch of the imagination. It has to be recaptured in the year you sell/trade-in the vehicle, and that recapture increases your AGI. It "could" have the potential to put you in the next higher tax bracket too.
