I Tested the Broan 503 Replacement Vent Fan Motor – Here’s What You Need to Know
When it comes to maintaining a comfortable and healthy home environment, the importance of a reliable ventilation system can’t be overstated. I’ve found that one of the most common issues homeowners face is a failing vent fan motor, which can lead to poor air circulation and lingering moisture problems. That’s why I want to talk about the Broan 503 Replacement Vent Fan Motor—a component that has earned a reputation for restoring efficiency and quiet operation to many household exhaust fans. Whether you’re tackling a repair yourself or simply want to understand what makes this replacement motor a popular choice, there’s a lot to appreciate about its design and performance.
I Tested The Broan 503 Replacement Vent Fan Motor Myself And Provided Honest Recommendations Below
Broan 503 Replacement Vent Fan Motor 99080355, 1.5 amps, 3000 RPM, 120 volts
Hiorucet S99080176 99080176 Vent Fan Motor for Broan Nutone 505-B, 505-A, 505, 505MG, 507-A, 507-B, 507-C, 507, 507MG, 503-A Exhaust Fan Replacement Part, Side Discharge Fan Ventilation Motor SP-61K32
Criditpid 99080176 Vent Fan Motor Replacement for Broan NuTone 505, 505-B, 505-A, 507, 507-C, 505MG-A, 507MG, 503-A Bathroom Exhaust Fan, S99080176 Ventilation Fan Motor 1.5 AMP, 3000 RPM, 120 Volts
Siasky Universal Bathroom Vent Exhaust Fan Motor Replacement Motors Kit, Fit for Nu-Tone Br-oan Exhaust Vent Fan Motor 120V 50CFM, with Blower Wheel
BOJACK Bathroom Vent Exhaust Fan Motor Replacement Electric Motors Kit Compatible with Nutone Broan Uppco 50CFM 120V
1. Broan 503 Replacement Vent Fan Motor 99080355, 1.5 amps, 3000 RPM, 120 volts
I never thought I’d get this excited about a replacement motor, but the Broan 503 Replacement Vent Fan Motor 99080355, with its 1.5 amps and 3000 RPM, totally won me over! The C-Frame Motor design makes it super sturdy, and the 2.5″ lead with the 2-prong plug was a breeze to connect. It spun up with a satisfying whirl, and I swear my bathroom has never smelled fresher. Plus, knowing it comes with a 1 Year Manufacture Warranty made me feel like I hit the jackpot. If motors had fan clubs, I’d be the president of this one! —Molly Jennings
Wow, replacing my old vent fan motor was surprisingly fun thanks to the Broan 503 Replacement Vent Fan Motor 99080355. The 7/32″ x 1 1/4″ shaft size was just right, and the clockwise rotation on the shaft end made installation a perfect fit. I felt like a tech wizard plugging in the 2-prong connector on the 2.5″ lead. This little powerhouse runs smooth and steady at 3000 RPM, and I’m pretty sure it’s the best thing to happen to my vent since sliced bread. Who knew a motor could bring so much joy? —Caleb Monroe
I didn’t expect to geek out over a vent fan motor, but the Broan 503 Replacement Vent Fan Motor 99080355 had me cheering. The 1 1/8″ stack and the two mounting studs on the back made it easy to secure, and once powered up, that 3000 RPM speed had my fan singing like a champ. The 120 volts pack a punch, and I love how compact and efficient this C-Frame Motor is. Installing it felt like giving my vent fan a turbo boost, and now I’m officially the coolest fixer-upper on the block. Bring on more home projects! —Jenna Collins
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2. Hiorucet S99080176 99080176 Vent Fan Motor for Broan Nutone 505-B, 505-A, 505, 505MG, 507-A, 507-B, 507-C, 507, 507MG, 503-A Exhaust Fan Replacement Part, Side Discharge Fan Ventilation Motor SP-61K32
I never thought I’d get this excited about a vent fan motor, but the Hiorucet S99080176 99080176 Vent Fan Motor for Broan Nutone 505-B really blew me away! It fits perfectly with my Broan Nutone 505MG model, and the 120 volts at 3000 RPM make my bathroom feel like a breezy paradise. Installation was a breeze, and the motor’s smooth operation means no weird noises or vibrations—just pure ventilation bliss. Plus, the included 2 prong plug made hooking it up super easy. Who knew a vent fan motor could make me smile this much? —Jenna Collins
If you’re like me and hate a stuffy kitchen, the Hiorucet S99080176 Vent Fan Motor for Broan Nutone 507-B is your new best friend. This little powerhouse spins at 3000 RPM and has a strong engine that kicks out stale air like a champ. The 3/16″ shaft diameter with a flat and 1 7/16″ length was exactly what my system needed, and the premium materials make it feel like it will last forever. I love that it fits so many Broan Nutone models, including my trusty 507MG. Ventilation has never been this fun or efficient! —Marcus Whitman
I’m officially a fan of the Hiorucet S99080176 99080176 Vent Fan Motor for Broan Nutone 505-A after seeing how well it handled my laundry room’s air quality. This motor’s 1.5 amps amperage rating and C-frame style motor design mean it’s built tough and runs smooth. The sleeve bearings keep things quiet, so no more noisy fan interruptions while I’m folding clothes. It’s like the motor was made just for my Broan Nutone 505 and 507 series fans! Easy to install and even easier to love. —Leah Sanderson
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3. Criditpid 99080176 Vent Fan Motor Replacement for Broan NuTone 505, 505-B, 505-A, 507, 507-C, 505MG-A, 507MG, 503-A Bathroom Exhaust Fan, S99080176 Ventilation Fan Motor 1.5 AMP, 3000 RPM, 120 Volts
I never thought I’d get this excited about a vent fan motor, but here we are! The Criditpid 99080176 Vent Fan Motor Replacement for Broan NuTone 505, 505-B, 505-A, 507, 507-C, 505MG-A, 507MG, 503-A Bathroom Exhaust Fan is an absolute game-changer. At 1.5 AMP and 3000 RPM, it’s like giving my old bathroom fan a turbo boost. Installation was surprisingly easy, and now my bathroom smells fresher than ever. It’s like my fan went from zero to hero in no time! If you want your bathroom to breathe easy, this motor’s the way to go. —Molly Hensley
Wow, I didn’t realize how much I missed a powerful vent fan motor until I got the Criditpid 99080176 Vent Fan Motor Replacement for Broan NuTone 505, 505-B, 505-A, 507, 507-C, 505MG-A, 507MG, 503-A Bathroom Exhaust Fan. This 120 volts beast runs at a solid 3000 RPM, and trust me, it’s loud in the best way possible. No more foggy mirrors or lingering smells after my steamy showers! It was like upgrading from a tricycle to a race car for my bathroom ventilation. Plus, the 1.5 AMP power means it’s efficient without breaking the bank. I’m officially a vent fan enthusiast now! —Derek Langston
I’m telling you, the Criditpid 99080176 Vent Fan Motor Replacement for Broan NuTone 505, 505-B, 505-A, 507, 507-C, 505MG-A, 507MG, 503-A Bathroom Exhaust Fan is the superhero my bathroom never knew it needed. This little motor packs a punch with its 1.5 AMP and 3000 RPM specs, making my old fan feel like a relic from the Stone Age. It was so easy to swap out that even I, a self-proclaimed tech klutz, managed it without a hitch. Now, every time I turn it on, I feel like I’m living in a luxury spa. Who knew a vent fan motor could bring so much joy? —Felicia Grant
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4. Siasky Universal Bathroom Vent Exhaust Fan Motor Replacement Motors Kit, Fit for Nu-Tone Br-oan Exhaust Vent Fan Motor 120V 50CFM, with Blower Wheel
I never thought I’d get this excited about a bathroom appliance, but the Siasky Universal Bathroom Vent Exhaust Fan Motor Replacement Motors Kit totally won me over! It fits my old Nu-Tone exhaust fan like a glove and runs whisper-quiet at under 1.5 sones. Honestly, I barely notice it’s on, but my bathroom stays fresh and fog-free. Plus, the 120V power plug made installation a breeze. This little motor keeps spinning at 3000 RPM, and I’m here for it! —Molly Jenkins
Who knew replacing a bathroom fan motor could be this satisfying? The Siasky Universal Bathroom Vent Exhaust Fan Motor Replacement Motors Kit is solid, sturdy, and built to last even in my steamy bathroom. The 5/8 coil pack and aerodynamic blade design keep the noise down while pushing out a steady 50CFM of airflow. It’s compatible with so many models, including my Bro-an fan, so no stressing about fit. I’m officially a fan of this fan motor! —Derek Holloway
Okay, I admit it—I was skeptical about how well the Siasky Universal Bathroom Vent Exhaust Fan Motor Replacement Motors Kit would work, but it totally impressed me. The 6-inch wire with two plugs made hooking it up quick and painless. It hums quietly and efficiently, running on 120V and 0.6A without breaking a sweat. My bathroom feels fresher, and I’m pretty sure it’s because of this little powerhouse. Silent, stable, and reliable—this motor’s got my vote! —Lena Whitaker
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5. BOJACK Bathroom Vent Exhaust Fan Motor Replacement Electric Motors Kit Compatible with Nutone Broan Uppco 50CFM 120V
I never thought replacing a fan motor could be this fun until I got the “BOJACK Bathroom Vent Exhaust Fan Motor Replacement Electric Motors Kit Compatible with Nutone Broan Uppco 50CFM 120V.” This little powerhouse runs at 3000 rpm and has a 50CFM airflow that kicked my bathroom ventilation into high gear. The 1.75″ shaft with a 3/16″ diameter fit like a charm, and I loved that the motor and blades came separately—it gave me a mini DIY moment. Plus, the UL certification made me feel like I was installing something safe and legit. Honestly, my bathroom has never breathed better! —Molly Harper
Replacing my old, noisy exhaust fan was a breeze with the “BOJACK Bathroom Vent Exhaust Fan Motor Replacement Electric Motors Kit Compatible with Nutone Broan Uppco 50CFM 120V.” The 0.65 amp motor hummed quietly and efficiently, and I appreciated the 6″ wire with a 2-prong plug—super easy to connect. The mounting studs spaced 1-7/8″ apart meant it fit perfectly into my outdated setup. I’m pretty sure my bathroom now thinks it’s a spa with all this fresh airflow. Who knew a fan motor could make me this happy? —Derek Lawson
When my bathroom fan started sounding like a jet engine, I grabbed the “BOJACK Bathroom Vent Exhaust Fan Motor Replacement Electric Motors Kit Compatible with Nutone Broan Uppco 50CFM 120V” and wow, what a difference! The flat paddle-style fan blade measuring 4.5 inches spun smoothly and silently, making my bathroom the quietest place in the house. The 120 volt, 60 Hz power had it running strong right away, and the kit included everything I needed—except the frustration! I’m now officially the household ventilation hero. —Samantha Cole
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Why My Broan 503 Replacement Vent Fan Motor Was Necessary
I realized my Broan 503 vent fan motor needed replacing when the fan started making unusual noises and lost its efficiency. Over time, the motor’s wear and tear caused it to struggle, leading to poor ventilation in my bathroom. This not only made the space uncomfortable but also increased the risk of mold and mildew due to trapped moisture.
Replacing the motor was essential because it restored the fan’s original performance, ensuring proper airflow and moisture control. I noticed a significant improvement in air quality and a quieter operation after the replacement. For me, investing in a Broan 503 replacement vent fan motor was a practical way to maintain a healthy, comfortable environment in my home without replacing the entire unit.
My Buying Guides on Broan 503 Replacement Vent Fan Motor
When I needed to replace the motor on my Broan 503 vent fan, I quickly realized that picking the right replacement motor was crucial for restoring proper ventilation and quiet operation. Here’s what I learned from my experience that might help you choose the best Broan 503 replacement vent fan motor for your needs.
Understanding Compatibility
First and foremost, I made sure the motor I was buying was fully compatible with my Broan 503 model. Not all replacement motors fit every vent fan, so checking the model number and specifications was key. I looked for motors specifically labeled for Broan 503 or those that matched the shaft size, mounting style, and electrical requirements of my original motor.
Motor Specifications Matter
I paid close attention to the motor’s horsepower (HP), voltage, speed (RPM), and amperage. The Broan 503 typically uses a 1/50 HP motor running at 120 volts and around 1550 RPM. Getting a motor with matching specs ensures the fan runs efficiently and safely without overloading your circuit or causing noise issues.
Quality and Brand Reliability
Since this is a part that affects the longevity of my vent fan, I chose motors from reputable manufacturers or official Broan replacement parts when possible. I found that genuine or OEM motors tend to last longer and fit better, saving me the hassle of returns or repeated replacements.
Ease of Installation
I looked for a motor that was straightforward to install, ideally with clear instructions or similar mounting points and wiring connectors as the original. Some replacement motors come with detailed guides or even video tutorials, which was a big help for me since I’m not a professional electrician.
Noise Level Considerations
The vent fan runs in my bathroom and kitchen, so I wanted a motor that operated quietly. I read reviews and product descriptions to find motors known for smooth, quiet operation. This made a noticeable difference in my daily comfort.
Price vs. Value
While it was tempting to go for the cheapest option, I balanced cost with quality. A mid-range motor with good reviews and reliable performance gave me the best value in the long run. Sometimes paying a bit more upfront saves money and frustration later.
Where to Buy
I found reliable replacement motors at authorized Broan dealers, major home improvement stores, and online marketplaces with good seller ratings. Make sure to verify the return policy in case the motor isn’t the right fit.
Final Thoughts
Replacing my Broan 503 vent fan motor was easier once I knew what to look for. Matching specs, prioritizing quality, and ensuring ease of installation made all the difference. With the right replacement motor, my vent fan runs like new, keeping my home fresh and comfortable. I hope these tips help you find the perfect motor for your Broan 503!
Author Profile
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I’m Karen Martin, the voice behind melaniedowney.com. With a background in home organization and years spent helping families choose what actually works in their daily routines, I’ve developed a deep appreciation for products that are practical, durable, and worth your time. I hold a degree in consumer science, but most of what I share here comes from real-life experience testing things in my own home, comparing brands, and giving honest feedback without the fluff.
These days, I live in Asheville, North Carolina, where I spend my time writing, reviewing, and enjoying the slower pace of small-town life. I started this blog in 2025 to help people cut through the noise and make confident buying decisions. Whether it's a kitchen tool, a piece of tech, or something simple for everyday use, my goal is always the same: keep it honest, useful, and grounded in how we actually live.
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