The rapid advancement of Advanced Driver-Assistance Systems (ADAS) and Autonomous Driving (AD) functions necessitates rigorous validation methods to ensure safety and reliability. Function validation in an integrated vehicle accelerates the homologation process of ADAS functions. Vehicle-in-the-loop testbenches, which can stimulate ADAS sensors, drastically reduce efforts and improve testing efficiency, leading to reduced time-to-market. This paper presents a comprehensive study on validating an over-the-air (OTA) camera stimulation setup integrated into a Vehicle-in-the-Loop (ViL) testbench. By leveraging this innovative testbench, we aim to streamline and enhance the homologation process for ADAS/AD systems. The ViL testbench offers a unique environment where physical vehicle components interact with simulated scenarios, enabling realistic and reproducible testing conditions. This study highlights the efficacy of the OTA camera stimulation in accurately replicating real-world conditions, thereby validating the camera-based ADAS/AD function's performance and response. Our findings demonstrate the potential to significantly reduce the need for on-road testing, thus accelerating the development cycle and ensuring consistent testing standards. The reproducibility and precision of this setup not only enhance the validation process but also contribute to safer vehicle systems.