Fisher previously pled not guilty to 2 misdemeanor counts of DUI -- but struck a plea deal with prosecutors in which he pled no contest to driving with a B.A.C. of .08 and got probation and 100 hours of community service (or 10 full days).

He's also required to install an ignition interlock device in his car -- which will monitor his breath before he can start the vehicle.

There's more ... Fisher must participate in a MADD victim impact panel where he will speak with families of victims in drunk driving accidents. Plus, he's been ordered to complete a 3-month-long alcohol education class.

Miraculously, no one was injured in the crash -- including his passenger/girlfriend, Gloria Govan.

After the incident, Fisher told his fans the situation will NEVER happen again.