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The Goodman B1376857 Motor Mount Arm is a genuine OEM bracket that secures the condenser fan motor within APH1543M41AA heat pump units. These mounting arms span the top of the cabinet and hold the fan motor centered over the coil so the fan blade spins true. Corroded, cracked, or bent mount arms cause fan wobble, vibration noise, and premature motor bearing wear—making this an inexpensive but important repair part.
The genuine Goodman B1376857 matches the factory hole pattern and arm length, so the motor sits at the correct height and the blade maintains proper tip clearance. A mismatched bracket can throw off blade alignment and cause vibration. At this price, OEM is the obvious choice.
Easy — Disconnect power, support the fan-motor assembly, unbolt the old arm, install the new bracket in the same holes, and re-secure the motor. A straightforward hardware swap for a DIYer or technician.