8664RP Replacement Motor for NuTone 8663RP B Unit - Quiet, Direct Fit

In this review the reviewer looks at the 8664RP replacement motor assembly S97017705 as a straightforward repair option for NuTone and Broan bathroom fans. The bottom line is that this motor is for anyone who needs a direct replacement for a noisy or worn-out NuTone 8663RP/8664RP B unit motor and wants a quick, money-saving fix; it installs in minutes, restores airflow, and reduces noise compared with a failing original. The review highlights fit, quiet operation, and simple plug-and-play installation as the single biggest reasons to choose this motor.

Key Features

• Direct replacement compatibility: Replaces NuTone JA2B104N/86933000 and fits NuTone 8663RP and 8664RP B units without modifying the ceiling or housing.
• Quiet operation: The S97017705 runs smoothly and is designed to reduce noise caused by worn or slipping motor shafts, improving bathroom comfort.
• Good airflow: Rated to move substantial clean air so steam and humidity clear quickly during and after showers.
• Easy install: The assembly includes the blower wheel and a 2-prong 120V plug so replacement usually takes under 10 minutes for anyone comfortable with basic wiring.
• Broad compatibility: Works with many NuTone and Broan models including 671R, 672R and Broan 750 series, reducing the need to replace the entire fan unit.
• Durable mounting: Uses a 3.3' diameter motor with two mounting studs opposite the shaft end for secure fitment.

Who It's For

The 8664RP replacement motor is ideal for homeowners, handymen, and landlords who need a cost-effective repair for NuTone 8663RP/8664RP or compatible Broan models and prefer replacing just the motor rather than the entire fixture. It suits anyone seeking quieter performance and restored ventilation without cutting ceilings or replacing housings.

It is not the best choice for users who cannot accommodate a slightly taller motor or who require a custom-fit motor with a nonstandard mounting arrangement; a full unit replacement or professional evaluation may be needed if the original installation has unusual clearances or an atypical motor angle.

Pros & Cons

Pros

• Fits many NuTone and Broan models for a true plug-and-play replacement experience.
• Noticeably quieter than many worn original motors and helps stop shaft slipping that causes noise.
• Improves bathroom ventilation and reduces lingering moisture on mirrors and walls.
• Easy to install with included blower wheel and standard 2-prong 120V connection.

Cons

• Some customers report the motor is taller than the original, so check clearance before purchase.
• A small number of users noted motor angle or fit issues in nonstandard housings.

Specifications

Model / Assembly	S97017705 (8664RP replacement)
Compatible models	NuTone 8663RP, 8664RP, 671R, 672R, Broan 750/751/752 and others
Performance	100 CFM; 3.5 sones
Electrical	120 V; 1.9 Amps; 2-prong plug
Rotation and size	CCW rotation; 3.3 in diameter motor
Mounting	2 mounting studs opposite shaft end

Our Verdict

The S97017705 8664RP replacement motor is a smart, value-focused repair for anyone with a noisy or failing NuTone 8663RP/8664RP or compatible Broan fan. It restores airflow, cuts noise, and installs quickly without replacing the whole fan housing; just verify motor height and shaft angle in your ceiling box before ordering to avoid clearance issues.

Frequently Asked Questions

Will this motor fit my NuTone 8663RP fan?
Yes, the S97017705 is designed as a direct replacement for NuTone 8663RP and 8664RP B units and replaces JA2B104N/86933000 in standard housings.

Is the motor quiet?
Most users report noticeably quieter operation than failing originals; the design reduces shaft slippage that often causes noise.

Does the kit include everything needed?
The package includes the motor and blower wheel and uses a standard 2-prong 120V plug, but basic hand tools are needed for installation.