The World Rally Championship Manufacturers' Championship (WMC) is awarded by the FIA to the most successful WRC constructor over a season, as determined by a point system based on rally results. The WRC was formed from well-known and popular international rallies, most of which had previously been part of the European Rally Championship and/or the International Championship for Manufacturers; the series was first contested in 1973. The first official rallying Constructor's Champion was Alpine-Renault. On seventeen occasions has the World Constructors' Champion team not contained the World Drivers' Champion for a given season.
In the 39 seasons the Championship has been awarded, only 11 different constructors have won it; Lancia being the most successful, with 10 titles including 6 consecutive from 1987 to 1992. Only six countries have produced winning constructions: the France (3), Japan (3), Italy (2), United Kingdom (2), Germany (1) and United States (1).