AMI PARTS SM550 Universal Bathroom Vent Fan Motor Kit – 50 CFM, 120V Replacement

Upgrade your bathroom vent with the AMI PARTS SM550 Motor Kit, a universal replacement designed to fit a range of NuTone and Broan fans. This compact kit pairs a 50 CFM motor with a standard 120V supply, delivering dependable airflow to help manage humidity in smaller spaces. Rather than a simple swap, you’re choosing a thoughtfully engineered component that harmonizes with existing housings and duct paths for a cleaner, more consistent ventilation experience.

What makes this kit a solid fit

• PART MODEL: SM550 replacement motor (120 V, 60 Hz, 0.29 A, 50 CFM, 3000 RPM) provides a practical airflow pace for compact bathrooms.
• DIMENSIONS & CONNECTION: 4 1/2" blade diameter; 1" blade height; shaft ~3/16" x 1 3/4"; 6" wire with 2-prong plug; mounting studs 1 7/8" on center; 5/8" coil stack.
• COMPATIBILITY: Replaces SM550, C01575, EM550, EM750, YJF6158, 65100, C65878, VFM100, E498-1, 82423K, K111; compatible with Nutone/Broan and related models; rotation is reversible (CCW & CW).
• EASY TO INSTALL: Clear installation guidance; practical steps to swap an aging motor while maintaining a clean wiring layout.

Why consider this kit? The 50 CFM performance is well suited for typical smaller bathrooms, helping reduce moisture and keep the air feeling fresh after showers. The 120V operation aligns with common residential outlets, and the six-inch wire length offers flexible wiring options for a secure, neat installation. The reversible rotation adds versatility for different ceiling housings and duct paths, making it a flexible upgrade choice in many homes.

Real-world use cases

• Replacing a worn or noisy motor in an older NuTone or Broan vent fan to restore steady airflow.
• Upgrading a failing exhaust unit in a compact bathroom where a quick, non-destructive swap is preferred.
• Using the reversible rotation feature to fit installation quirks in ceiling housing or duct routes.

What to expect in practice. The kit ships with a motor that fits a broad set of listed part numbers, reducing guesswork during replacement. It is designed for ease of installation for both DIYers and professionals, with straightforward mounting and wiring steps. While performance can vary with home conditions and duct layouts, many users notice improved ventilation and moisture control after replacement.

Ease of installation and aftercare

• Power off, wear gloves, and cut power before starting; follow standard safety steps for any replacement.
• Inspect ducting for obstructions and ensure secure wiring connections to maintain airflow efficiency.
• Store spare parts in a dry place for future replacements and quick maintenance.