This study is an attempt to understand the role of seaport-based logistic platforms in the distribution of automotive parts from France to assembly plants in emerging countries. A diverse range of opinions on location and sourcing strategies of automakers and part-suppliers have been presented in economic geography: namely the ways in which part suppliers follow or not auto-makers to new markets and how sourcing logistics takes place. In response to this, the authors clarify the reality of such logistics by considering the case example of a third-party logistics (3PL) provider (Gefco) which has developed auto-parts logistic-platform to supply overseas car assembly plants (Brazil, Argentina, China) for PSA Peugeot Citroën. The authors will shed light on the fact that, in order to accommodate distribution to overseas assembly plants, logistic platforms operated by 3PL providers are located near seaports, and will seek to further clarify the functions of these platforms. This analysis will also enable new insights to be gained: the follow sourcing strategy is rather limited to few components and instead part-suppliers tend to ship most of auto-parts from Western Europe. How can we explain the actors supply chain reacts facing this competitive reversal of logistical flows? In this context, 3PL logistics platforms play an important role, ensuring high frequency deliveries to overseas assembly plants.