It depends. The rules for taking Section 179 require a 51% business use of your vehicle. The business use percentage of the cost may be eligible for Section 179 if chosen the first year it is placed in service for business.
Business use percentage is determined each year by taking the business miles and dividing it by the total miles for the year. If at any time during the life of the vehicle the business use drops below 51%, then a recapture of the Section 179 would be required. This means some of the expense would be added back to your income in that year and the depreciation would change, if applicable.
There are special rules and limits for vehicles which are considered 'Listed Property'.
TurboTax will walk you through this when you enter your vehicle. Driving down Taxes