Jennifer Lopez -- Drunk Driver Wrist Slapped For Trashing Her Rolls

The hammered guy who nailed Jennifer Lopez's brand spanking new Rolls-Royce is getting off easy -- despite a BAC nearly twice the legal limit -- he won't do jail time.

Law enforcement sources tell TMZ ... Robert John Reitz plead no contest to one count of DUI, and an L.A County judge sentenced him to 3 years probation and ordered him to complete a 3 month alcohol program. That's it.

Reitz plowed into JLo and Leah Remini last September on PCH ... then fled the scene. He later blew a .15.

JLo did get $25k in restitution ... which probably covers a cracked taillight on a Rolls.