This research is based on a mail survey in the Swedish vehicle industry. It is concluded that the sub-contractor and customer sourcing in the firms' inbound and outbound logistics flows differ from each other. Furthermore, that there is no association between the sub-contractor and customer sourcing in the firms' inbound and outbound logistics flows. Finally, there is in part an association between the sub-contractor and customer sourcing, and the occurrence of quantitative and qualitative disturbances in firms' inbound and outbound logistics flows.