A coupler guard configured to protect an aux coupler assembly from side impacts in the rough use environment of a loader. The coupler guard comprises an encasement and a side plate. The loader comprises the aux coupler assembly and a hinge extension. The encasement wraps around a top portion and interior side of the aux coupler assembly. The side plate attaches to a portion of the encasement and protect an exterior side portion of the aux coupler assembly. A screw assemblies selectively attaches the encasement to the side plate. A ring attaches to a portion of the side plate. The ring selectively wraps around a portion of the hinge extension of the loader. A ring screw assembly selectively holds the ring and the rest of the coupler guard to the hinge extension. An edge trim selectively sits on top of a portion of a first arm.