5, W 521, is a piano concerto by the Brazilian composer Heitor Villa-Lobos, written in 1954.

One performance recorded under the composer's baton lasts 18 minutes, 48 seconds.

[1] The work is scored for solo piano and an orchestra consisting of piccolo, 2 flutes, 2 oboes, cor anglais, 2 clarinets, bass clarinet, 2 bassoons, contrabassoon, 4 horns, 2 trumpets, 3 trombones, tuba, timpani, percussion (bass drum, xylophone), celesta, harp, and strings.

After an orchestral introduction featuring a mirror motif, the main theme enters at rehearsal number 3.

A bridge, in which the opening mirror motif is played by the piano, leads to the second, chromatic, Gershwinesque theme at rehearsal no.