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The Goodman B1376857 Motor Mount Arm is a genuine OEM structural bracket for the ACEC960403BNAA air conditioner and compatible Goodman/Amana equipment. The mount arm holds the blower or fan motor securely in position, maintaining correct shaft alignment and absorbing operating vibration. A bent, cracked, or corroded mount arm causes excessive noise, motor wobble, and premature bearing wear.
The OEM B1376857 matches the factory bolt pattern, arm length, and gauge thickness so the motor sits at the precise designed height and angle. Generic or modified brackets can throw off shaft alignment and stress the motor. OEM ensures correct geometry and full service life.
Moderate — 30–45 minutes. Disconnect power, support the motor, remove the old arm's fasteners, transfer the motor to the new arm, and re-torque all bolts while verifying alignment. Standard nut drivers and wrenches required.