Laser/infrared welding of plastics and polymers is a modern joining method with many technological advances for design and manufacturing of various automotive components. Recent developments of the high-power diode laser systems and achieved level in process automation make laser/infrared welding cost effective. lt makes this technology more realistic at the current and future in various areas of dynamic growing markets. The aim of the current paper is to enhance the understanding of the engineering community regarding the usefulness and applicability in laser welding of thermoplastics, and its increasing use in various automotive and transportation application. Colored polyamides/polyamides are high performance semi-crystalline thermoplastics with a number of very attractive mechanical and technological properties for various welded automotive plastic parts. Developed family of colored polyamide 6 based plastics (un-filled and fiberglass reinforced) have enriched mechanical and technological properties and may be successfully used for laser welding technologies such as through-transmission (traditional and clear-weld) noncontact. Selection of thermoplastics for infra-red/laser welding technology from commercially available and experimental grades, depends on the nature of the applied method, material structural (composition), various additives, color version of the joined thermoplastics, and coloring technology used. Developed results and recommendations will help automotive parts designers, technologist and material developers, in the selection of polyamides for infrared/laser technology, welded parts design, and laser welding technology optimization.