The penalty stems from a late-race incident between Bowyer and Denny Hamlin in last weekend's Nationwide race at Dover. Bowyer and Hamlin were battling for position during a late restart when Hamlin clipped Bowyer, forcing him to pit.
Hamlin called the bump "unintentional," but Bowyer raced out of the pits and slammed into Hamlin. Bowyer's No. 21 car was parked immediately by NASCAR officials and he finished 24th.
Hamlin wound up 12th.
The probation covers all three of NASCAR's major series. Bowyer is a regular on the Sprint Cup Series and drives occasionally on the Nationwide circuit.