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The Goodman B1376853 is a genuine OEM blower motor mount arm (mounting leg) for the Goodman/Amana ARPF364216AA air handler. It secures the motor to the blower housing belly band, holding the motor centered and rigid so the blower wheel spins true and vibration is not transmitted into the cabinet.
The OEM arm matches the original bolt pattern, leg length, and bend angle, ensuring the motor seats at the correct depth and shaft height. Generic or bent legs throw the wheel out of alignment, causing rubbing and noise. Because the part is inexpensive, replacing with genuine OEM is the practical choice.
Easy to moderate. Typically replaced as part of a motor or belly-band service — loosen the band clamp bolts, swap the arm, and re-center the motor. Plan 20–40 minutes. Cut power before servicing.