Recently, the superior rheological, thermo‐physical, and tri‐bological aspects of nanofluids are appropriate for heat transport properties and lubrication in autos. Nanofluids in autos have promising uses for instance a furnace coolant, machine oil, air conditioning structure lubricant, engine oil, foot‐brake fluid, and shock absorber. The thought of nanofluid has made influential devotion from researchers everywhere in world owing to their exceptional thermo‐physical properties and numerous potential assistances and uses in crucial fields for instance, thermosphere, vitality, CPU equipment, and bio‐medicine. Here the article reports the features of heat transport, possessions and persuading parts of fluid, influencing procedures and mechanisms of nanofluids. Furthermore, the purpose of this article is to explore the latest research outcomes in the undeveloped workings on nanofluids, so that scientists in the arena of energy change have a more exhaustive and clears sympathetic view of the energy alteration properties and uses of nanofluids. The 3D Carreau fluid with diverse properties of heat/ mass transportations, that is, MHD, mixed convection, radiation, heat sink/source, Soret‐Dufour impact, zero mass flux and activation energy are examined with bvp4c approach. The Dufour and thermal Biot factors enhance the temperature field; similarly, thermophoretic and Soret factors exaggerate the field of concentration. The larger value of Brownian factor decays the concentration field.