Suge Knight -- Three Years Probation for Driving on a Suspended License

Suge Knight better be on his best behavior for the next three years -- because the rap mogul just got sentenced to 36 months probation for driving on a suspended license.

As TMZ first reported, Suge's badass black truck was impounded back in February -- after cops cited Knight for driving on a bum license.

Suge pled no contest to the charge -- and was given three years unsupervised probation.