Electric motors in Brazil are responsible for the consumption of about 25 percent of all electricity in the country and, being mostly presented in the industry. These equipments are manufactured for being used in hydraulic pumps, air compressors, elevators, etc., and can be commercialized in compliance with the energy efficiency levels defined by INMETRO/MDIC Ordinance N488 of 2010, ensuring adequate energy consumption. However, some establishments are commercializing refurbished motors, not complying with the regulation considered by the Ordinance, including reforming motors without a minimum condition of use. The aim of this dissertation is to evaluate the Brazilian market of refurbished motors, including resale market and maintenance market, estimating the energy losses due to incorrect reconditioning. The methodology of the work can be divided in five steps: state of the art of refurbished motors; quantifying companies and employees by querying the database come from the government; survey on samples of companies that are doing the refurbishing service; extrapolation of the study conducted in the surveyed samples of companies to the population of companies; comparison of results with previous studies and estimating of energy losses in Brazil. As a result, the market for refurbished motors was characterized and dimensioned, containing: 6 503 companies; 24.400 employees; 45 percent of companies performing resale of refurbished motors; 6.9 million motors being refurbished per year, totaling 7.46 percent of energy losses, equivalent to 2.9 TW h. In addition, of the 20 million motors remaining in Brazil in 2016, there is a loss of 8.4 TW h per use of refurbished motors, and a large increase of the sale of low quality imported motors. Thus, all the proposed objectives in this dissertation were achieved, having been identified the new trends in the Brazilian electric motor market and generating subsidies for energy efficiency policies in the country.