Mafersa S.A. is a Brazilian manufacturer of passenger rail cars, buses and trolleybuses, and related components.

However, export orders included, in 1990–92, 38 stainless-steel push-pull commuter rail cars for the Virginia Railway Express[3] (10 control cars [cab-equipped trailers] and 28 trailers)[4] and 256 metro-car bodyshells for the Chicago Transit Authority (as a subcontractor to Morrison-Knudsen).

A subsidiary of Alstom keeping the same name, Mafersa SA, continued producing rail vehicle components (such as wheels and axles), while manufacturing of rail cars also continued but now under the name, "Alstom Transporte do Brazil S.A."[6] Alstom sold the technology and license of Mafersa SA to MWL Brasil Rodas & Eixos Ltda.

in November 1999, and this company continued making rail-vehicle components, initially under the Mafersa name.

[9] Between the start of production in 1985/86 and 1988 more than 600 diesel buses had been delivered to various cities.