<p>This review paper explores the diverse applications of nanofluids in the automotive industry, highlighting recent advancements and their implications. Nanofluids, which are engineered colloidal suspensions of nanoparticles in base fluids, have shown significant potential in enhancing the thermal and mechanical performance of automotive systems. The paper systematically reviews the use of nanofluids in various automotive applications, including coolant systems and lubricants. The review begins by examining the role of nanofluids as coolants in car radiators, where they have demonstrated improved heat transfer efficiency compared to conventional coolants. Studies indicate that nanofluids can enhance the thermal conductivity and heat dissipation, leading to better engine performance and fuel efficiency. The paper also discusses the application of nanofluids in lubricants, where they reduce friction and wear, thereby extending the lifespan of engine components. The application of nanofluids in other automotive systems, such as air conditioning, thermoelectrical generator and battery packs have also been thoroughly discussed where their outstanding properties can significantly improve the efficiency of the system. The outcomes of the reviewed studies suggest that nanofluids offer promising benefits in automotive applications, including enhanced thermal management, reduced wear and tear, improved fuel efficiency, and lower emissions. However, the paper also identifies challenges such as the stability of nanofluids, cost implications, and the need for further research to optimize their formulations and applications.</p>