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The Goodman B1376853 Motor Mount Arm is the genuine OEM bracket that supports the blower motor inside the WAHME3137P4AAA air handler. The mount arm holds the motor in precise alignment with the blower wheel so the assembly spins true and the rubber isolators dampen vibration. A bent, rusted, or fatigued arm lets the motor sag, throwing off wheel clearance and producing noise and uneven wear.
The OEM B1376853 is bent to the exact angle and hole pattern the cabinet and motor band require, keeping the motor centered in the housing. Generic or bent-back original arms rarely restore true alignment and can leave the motor cocked. For a mount that controls running clearance and vibration, the factory part is the correct call.
Easy to Moderate (2/5). Disconnect power. Support the motor before removing the old arm, transfer the motor band to the new arm at the same position, and re-secure to the cabinet. Recheck wheel-to-housing clearance after tightening. About 30–45 minutes.