The Datsun DA was a small automobile produced by Nissan and sold under the Datsun brand as Nissan's first post-war passenger car. The DA was introduced in November 1947, a direct result of the occupying Allied command once again allowing production of passenger cars. As the tooling for the pre-war Datsun Type 17 was no longer available, the DA was based on the Datsun 1121 truck (which itself was based on the pre-war 17T truck); it used the 722 cc Type 7 side valve engine from the 17T as well as its floor-shifted 3-speed manual transmission and front clip, including a pressed steel grille and nearly no brightwork.