Self development wireless sensor nodes is a wireless measurement instrument for key components of railway vehicles. Self development wireless sensor nodes consists of a wireless sensor node that monitors the core parts of the railway vehicle and a VEH(Vibration-based Energy Harvester) that supplies power to the wireless sensor node. In the VEH, power was generated by using vibrations generated from various structures or components, and the power generation efficiency was maximized by the resonance phenomenon between the excitation frequency of the vibration load generated in the target structure and the component and the natural frequency of the VEH-itself. The power generated by such a VEH is used as a power source for a wireless sensor node. On the other hand, Self development wireless sensor nodes should have the same durability life of 20 years as the railway vehicle. Therefore, this paper aims to evaluate the durability life of a self development wireless sensor nodes under the operating environment of a railway vehicle.