Abstract: The effect of temperature on the corrosion behavior of Al-12Si-1Mg automotive alloy in 3.5% NaCl solution was studied. The work was carried out using conventional gravimetric measurements and complemented by resistivity, optical micrograph, scanning electron microscopy (SEM) and X-ray analyzer (EDX) investigations. Gravimetric analysis confirmed that with varying exposure periods by both the environment the weight loss of the alloy increases and the normal corrosion rate profile of an initial steep rise followed by a nearly constant value of corrosion rate were observed. The rate of corrosion at room temperature of the alloy was found to be lower than that of higher temperature solution. At higher solution temperature attack of corrodent on surface is increased due to higher rate of chemical reactions. Optical micrographs of the alloy show the higher pit density at higher solution temperature.