Vehicular Terrorism Prevention Act of 2017 This bill directs the Department of Homeland Security (DHS) to: (1) examine actions DHS is undertaking to combat the threat of vehicular terrorism, and (2) report to Congress. The report shall outline examinations of: the current threat level for vehicular terrorism, actions DHS is undertaking to guard against vehicular terrorism, how the threat of vehicular terrorism may be mitigated, the extent to which DHS is doing outreach or training with private sector partners in response to such threat, and actions Congress can take to help DHS mitigate the threat.