In 2002, a completely new-looking, round-shaped Belarus 1222 was introduced. A couple of years later, smaller models were added to the updated lineup, which received the model designation suffix .3. The 1222 model featured a new, curved-glass cab, which, however, was not included in the smaller models; they still had the older-style cab. Later, a parallel model 1221 with the old-style cab was also introduced alongside the 1222.

The "three-series" featured oil-bath disc brakes, electric four-wheel drive engagement, automatic differential lock, separate hydraulic oil, 3 hydraulic valves as standard, and a side exhaust pipe. The engines were intercooled 4.75-liter four-cylinders and 7.12-liter six-cylinders. The 6-cylinder models also had electric PTO engagement. The 1222 was also available equipped with a Deere six-cylinder engine. Models equipped with a 16+8 gearbox had a dry dual-plate clutch. The cabin noise level was successfully reduced slightly from the traditional 85 decibels. In Finland, some models were reported to have slightly higher power ratings than elsewhere.

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