Advanced Driver Assistance Systems (ADAS) are revolutionizing automotive safety, relying on radar, camera, and LiDAR modules to enable features such as adaptive cruise control, automatic emergency braking, and lane-keeping assist. These components require ultra-high assembly precision to ensure accurate signal transmission and detection performance. Radar modules, in particular, demand a welding process that does not interfere with electromagnetic signals, protects internal lenses and sensors, and provides reliable hermetic sealing for outdoor operation. Traditional welding methods may generate metal particles or create uneven weld seams that disrupt radar signals, while adhesive bonding may introduce contamination or fail under harsh environmental conditions. DaokeDao plastic laser welding offers micron-level positioning accuracy and minimal thermal distortion, ensuring that internal components remain aligned and undamaged during assembly. The weld is clean, particle-free, and narrow, avoiding signal interference and maintaining the integrity of the radar’s dielectric properties. It provides a stable hermetic seal that resists rain, dust, UV radiation, and temperature fluctuations, ensuring consistent performance in harsh outdoor environments. The process supports complex 3D contours and multi-curved surfaces common in radar housings, adapting to the diverse design requirements of ADAS systems. With fast cycle times and high consistency, our laser equipment supports large-scale manufacturing, helping automotive suppliers meet the strict performance requirements of autonomous driving systems and improve product reliability.