In spring 2007, the updated smaller models of the 6400 series were introduced. A more striking, one-piece opening engine hood helped distinguish the new models from the old ones. Under the hood, there were new engines equipped with 4-valve technology, common rail injection, and electronic control. The biggest change was the replacement of the most powerful four-cylinder engines, namely those in the 6460 and 6470, with SisuDiesel engines. The torque rating increased, for example, in the 6470 from 492 Nm to 625 Nm. Clearly better torque figures were also achieved for the smallest models with Perkins engines. The 6-cylinder Perkins engines grew to 6.6 liters.

Additional power, as is typical for MF, was available already from the 8-9 km/h gear, meaning also in fieldwork. The transmission was the Dyna-6, introduced a couple of years earlier. Except for the two smallest models, it was also available in a 50 km/h version. Both 40 km/h and 50 km/h speeds were reached already at 1880 rpm. In Finland, a closed hydraulic system with a flow rate of 110 l/min was standard. The tractor’s front frame was new and the wheelbase longer than before. The weight was a couple of hundred kilograms less than before. For some reason, the fuel tanks of the four-cylinder models were smaller, and achieving a long working day on one tank required choosing a larger tank as an optional accessory.

From the beginning of 2009 onwards, the chassis color changed from black to gray. In autumn 2010, the engines of models 6465, 6475, and 6480 were replaced with Agco Sisu Power units.

The 6445 and 6455 were also available in a slug-nosed version. In 2011, their appearance was changed to match that of the 5400 series slug-nosed versions, and at the same time, sales of these two models with the normal hood ended. In Finland, the 6455 had already previously been marketed only in the slug-nosed version.

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