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The Goodman B1376857 Motor Mount Arm is a genuine OEM replacement bracket designed for the Goodman ACEC960603BNAA air handler/furnace assembly. This arm secures the blower motor to the housing, holding it in correct alignment so the motor and blower wheel spin true and vibration-free. A cracked, corroded, or bent mount arm causes rattling, motor wobble, and premature bearing wear — replacing it restores quiet, stable operation.
OEM vs. Generic: This is the factory Goodman part, machined to exact mounting-hole spacing and gauge thickness. Generic universal mounts often require drilling or shimming and may not hold motor alignment under load. For a guaranteed fit on the ACEC960603 platform, the OEM arm is the reliable choice.
Install Difficulty: Easy (1/5). Disconnect power, remove the blower assembly, swap the arm using the existing hardware, and reinstall. Basic hand tools only — typically a 15-minute job for a DIYer comfortable working inside an air handler.