AbstractThis paper presents a nonlinear approximation for natural convection magnetohydrodynamics flow and mass transfer in a vertical passage filled with nanofluid with an induced magnetic field effect. The influence of the thermophoretic and Brownian motion diffusion is taken into account. The mathematical formulation comprises the significant impact of nonlinear density variation with temperature and concentration (NDTC) in the momentum equation. The uniform magnetic field is considered to be perpendicular to the vertical channel. The wall at y = 0 is considered to be nonconducting at constant heat flux whereas electrically conducting at a constant temperature at y = h. The analytic solution is achieved via the perturbation method for small thermophoretic and Brownian motion diffusion effects. The implications of the embedded parameters on the flow properties are demonstrated through graphs and tables. During the analysis, we discovered that under the influence of thermophoretic and Brownian motion diffusion, suction parameter augment decreases the mass transfer rate but the converse is true for Schmidt number. NDTC in the buoyancy term enhances the skin friction. The skin friction could be reduced by increasing the numerical values of Hartmann number, Prandtl number, magnetic Prandtl number, and suction parameter.