Datsun 521 Truck

Much of the rest of the truck remains unchanged, though it now has a dash that is all black, where the 520 had the dash painted the same colour as the body. The grille on the first of the 521s had three horizontal bars grouped closely together in the middle, and a slightly wider bar at the top and bottom. In the section between the top bar and the group of three bars, and between the group of three bars and the bottom bar there is a series of intricate and fine horizontal and vertical bars. Later 521s had a wide bar in the middle where the three horizontal bars went on the 1968 model. The other changes involved new front indicators that were longer and sat under the headlights rather than on the corner of the guard. Also the 520 had three horizontal slots in the panel under the grille, the 521 has two horizontal slots.

 Initially the engine remains the same, using the J engine, which is a 1299cc 67hp OHV 4 cylinder engine. Later the engine was enlarged to 1483cc with the introduction of the J15 engine, which produced 77hp. In the United States the later 521 was available with the 1595cc 96hp OHC L16 engine from the Bluebird 510 sedan. The gearbox is a 4 speed with synchros on all forward gears. A long wheel base model, the G521, was also available. It had a 2770mm wheelbase.

 The 521 was in production until February 1972, when it was replaced with the completely new Datsun 620.