In 1972, the updated UR I series models 4712, 5711/5745, and 6711/6745 were introduced. Alongside these, the factory also had models equipped with cabs: 4718, 5718/5748, and 6718/6748 (top image), but only the versions without cabs were brought to Finland and were fitted here with the Terä cab, which did not have a heating system. The engines of the 4712 and 6711 models had an increased cylinder bore by 5 millimeters. Initially, the power figures announced for Finland were 41/55/59 hp DIN, and later 45/57/65 hp. International brochures list the latter figures as gross power.

Considering Finnish conditions, a good feature was the forced feed device for the injection pump. The transmission was strengthened in the update, for instance, by increasing the width of the reduction gear sets. The 6745 had a stronger front axle than before. Rear-wheel-drive models were also equipped with a lowering, air-operated quick gear, but this was not brought to Finland.

For the year 1977, Finland switched to the better-upholstered Terä cab equipped with a heating system.

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