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The B1376853 is the genuine Goodman blower motor mount arm (mounting leg / belly-band bracket) for the ACVC800603BXAA gas furnace and compatible Goodman/Amana models. These arms bolt to the motor's belly band and secure it inside the blower housing, holding the motor concentric to the wheel so it runs quietly and without vibration. A bent, cracked, or missing arm lets the motor sag and the blower wheel rub or hum — replacing the arm restores proper alignment.
The OEM arm matches the original hole spacing and bend angle, so the motor sits exactly where the factory intended and the wheel clears the housing. Generic or reused bent arms can leave the motor off-center, causing noise and premature bearing wear. For correct alignment, use the OEM arm.
Easy (2 of 5). Most mount-arm jobs are a handful of bolts, about 20–30 minutes, though tight blower compartments add time. Cut power first. Replace mount arms in matched sets if the others show fatigue, and confirm the wheel spins freely before restoring power.