The objective of the Moving Texas Exports series of papers is to describe the supply chains for six of Texas’ major export commodities and identify the role of transportation in the supply chain. Texas’ motor vehicle part manufacturing supply chain is highly integrated with motor vehicle part manufacturers in Mexico. The border crossing process for motor vehicle parts differs depending on whether truck or rail is used to transport the motor vehicle parts. This is the fourth paper in the series and documents the role of transportation in the motor vehicle part export supply chain and key transportation issues and concerns.