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Specs are compiled from manufacturer listings and verified buyer reviews and can change over time — please confirm the key details on the product page before buying.
Swapping just the motor is almost always the smarter move than tearing a whole fan assembly out of your ceiling. A replacement motor slides into the housing you already have, so you skip the drywall repair, the duct work, and the ladder time. What matters most is matching three things: the airflow rating in CFM (cubic feet per minute — how much air the motor pushes), the shaft size in inches, and the mounting stud spacing, because those decide whether the part drops straight in or sits in a drawer. The nine motors below are the ones that consistently drop straight in for the most common Broan, NuTone, and Uppco fans.
I’m Min — the founder and writer behind Gadgets Feed. This guide is built by comparing the manufacturers’ published specifications and the patterns across verified customer reviews, so you get each pick’s real strengths and trade-offs instead of marketing spin.
The trick is reading the housing label before you order anything, because a 3/16-inch shaft and a 1 7/8-inch stud spacing cover most of the failures you will run into. Here is what actually separates a good match from a return when you shop for bathroom exhaust fan motors.
Our Picks at a Glance
How To Choose Bathroom Exhaust Fan Motors
The fan motor is the whole point of the fan — the housing is just a box. Get the airflow number and the shaft dimensions right and the job takes ten minutes. Get either wrong and you are looking at a return, a rebuild of the mounting plate, or a ceiling repair you did not want.
Match the CFM and RPM to the fan you already have
CFM stands for cubic feet per minute — the volume of air the motor can move, and it is the number that decides whether steam actually leaves the room. Most standard bathroom fans run at either 50 CFM or 70 CFM, so measure what you have before you order. RPM is how fast the shaft spins, and the models here sit at either 3000 rpm for the standard shapes or 1550-1480 rpm for the heavier cylinder-style motors. The two values work as a pair: a 50 CFM motor at 3000 rpm and a 70 CFM motor at 3000 rpm move different volumes at different noise levels.
Check shaft diameter, shaft length, and stud spacing
The shaft is the metal rod the blade sits on — it carries the fan wheel, so both its diameter and its length matter. Most of the motors here use a 3/16 inch shaft, which is the common standard for Broan and NuTone housings. Stud spacing is the distance between the mounting bolts, and it is the silent killer of a good install; the Kitchen Basics 101 runs 1 7/8 inch on center, and that figure either lines up with your original bracket or it does not. Measure the old motor before you order anything, because the model number alone is not enough when you are replacing a part on a fan that is twenty or thirty years old.
Know what continuous duty means for a bathroom fan
Continuous duty means the motor is built to run nonstop without overheating, and bathroom fans need that because steam and odour do not follow a timer. A motor rated for continuous duty with air over the windings (air movement cooling the motor as it spins) will hold up to long showers and repeated cycles. That is the difference between a motor that runs for a decade and one that slows down and starts squeaking after a year.
Quick Comparison
| Model | Best For | Airflow | Speed | Voltage | Amazon |
|---|---|---|---|---|---|
| Kitchen Basics 101 C01575★ Best Overall | Most common Broan/NuTone swaps | 50 CFM | 3000 rpm | 120V | Amazon |
| Ceoighe 1 Pack KitBest for Broan 678 | Vintage Broan N688 fans | 50 CFM | 3000 rpm | 120V | Amazon |
| BOJACK BJ-YJF-6158Compact Pick | Easy plug-in swap with the blade included | 50 CFM | 3000 rpm | 120V | Amazon |
| NOOTO S97012038 | Broan 659/662/688 series | 50 CFM | 3000 rpm | 120V | Amazon |
| PANDEELS SM550 2-Pack | Two-fan households | 50 CFM | 3000 rpm | 120V | Amazon |
| CLLOMAGY SMA-001 | NuTone 8663Rp / 8664Rp housings | — | 1550 rpm | 120V | Amazon |
| Broan-NuTone RE70BN | Upgrading a 50 CFM fan to 70 CFM | 70 CFM | 3000 rpm | — | Amazon |
| LEZYWONE 89850000 | Quiet 605/665/668 series swaps | 70 CFM | 3000 rpm | 120V | Amazon |
| Cylrod 8664RP | NuTone 763RL / 769RL / 750 fans | 100 CFM | 1480 rpm | 120V | Amazon |
In‑Depth Reviews
1. Kitchen Basics 101 C01575 Universal Bathroom Exhaust Fan Motor Kit
Our pick — over 4.5★ from 900+ verified ratings; the strongest balance of quality and price.
The safest first pick if your old fan box is already in the ceiling and you just want it working again.
The Kitchen Basics 101 C01575 covers more fans than anything else on this list. It replaces the Nutone Broan, Uppco, Ventorola E498-1, Bay Motors, Sears 569, Dayton, and 65100, VFM100, C65878, 33-100, 82423K, EM550, K111, EM750, 784A, f784a, 676d/2676f, and 763rln part numbers — meaning if you own a common Broan or NuTone unit from the last thirty years, the odds are good you have the right one in your hand. Specs are 50 CFM, 3000 rpm, 120 volts 60 Hz, continuous duty, with a 2.25-inch by 3/16-inch shaft and a 6-inch wire ending in a 2-prong plug. The mounting studs are 1 7/8 inch on center, and the shaft is mechanically reversible — it ships counter-clockwise, but you can flip the orientation if your housing needs the other direction.
The best part is that the paperwork actually matches the way the job goes. The wire is a 2-prong plug that pushes straight into your existing connector, and the whole swap is a remove-clean-mount sequence that usually runs under half an hour. It also carries UL/CSA approval and a two-year no-questions-asked warranty — the longest coverage here, since most alternatives state one year or nothing. If you have a Broan 688 or a Nutone 763RLN that has gone quiet, the C01575 is the one I would start with.
Sizing is the one thing that will trip you up. Buyers report that the safest bet is to verify the dimensions rather than trust the model number alone, because a full fan assembly ordered on model number alone has sent people back to the drawing board. The motor also runs a little differently under load — not badly, and the noise is often used as white noise by people with this pick because it is not harsh. But the direction is honest: quieter than a failed motor, not silent. The mounting bolt pattern is also a specific size, and if it does not match your old bracket, you are drilling new holes.
Where It Wins on Match
- Confirmed swap for the widest list of common Broan, NuTone, Uppco, and Dayton part numbers on this list
- Same 50 CFM and 3000 rpm as the fans it replaces, so airflow is not a question
- Reversible shaft lets you handle either housing orientation without a new motor
- Two-year warranty and UL/CSA approval — almost unheard of at this tier
Honest Limits
- Still a motor-only part, so you need the existing housing and bracket in usable condition
- Shaft sizing needs to be measured, not guessed, or the blade will not seat
- Not silent — the motor makes normal operation noise even when working correctly
Pick it when: your Broan or NuTone housing is intact, the label shows a 50 CFM fan, and you want the widest compatibility with the longest warranty.
Look elsewhere if: your fan is a 70 CFM or 100 CFM unit — the airflow rating is fixed and you will need one of the larger motors below.
2. Ceoighe 1 Pack Bathroom Fan Motor Replacement Exhaust Fan Motor Kit
The motor-plus-blade kit that drops into the older Broan housings most people are trying to revive.
The Ceoighe kit is the one that specifically calls out the vintage Broan N688 and 678 family by number in the compatibility list, and it ships with both the motor and the blower wheel fan blade in a single box. That matters, because on old fans the plastic wheel is often the part that has cracked or rubbed down, and buying them separately is a second order and a second wait. Specs are 120 volts, 60Hz, 1A, 50 CFM, 3000 rpm, CCW rotation, with a 3/16 x 1.5 inch splined shaft and a 6.5 inch wire that ends in a 2-prong plug. The blade itself is 4 5/8 inches by 1 1/8 inches, and the whole kit weighs 1.2 pounds.
Installation is where this one earns its place. Owners mention that swapping the motor takes less than thirty minutes and that the unit slots into N688 models with no bracket work, which is the whole reason someone buys a motor instead of a full fan. Some customers note the fan needs a firm push to seat on the motor shaft, which is normal for a splined fit and does not affect function. One reviewer noted a cracking sound after a week of use and found the fan had cracked where the shaft enters it, then reinstalled the original blade and had no further issues — treat the blade as the part to inspect before you push it home, and you avoid the one recurring complaint.
Airflow is the honest limit here. It pushes through the same ducting and flap as the original, and reviewers point out it is quieter than the failed motor without being stronger. That is fine if your bathroom is a standard size and your fan already did the job before it quit, but if you were hoping for a boost in venting power, this kit will not deliver one. It matches the old spec; it does not raise it.
The Purchase Logic
- Ships with the motor and blower wheel together, so you avoid a second order on a cracked blade
- Confirmed fit for the vintage Broan N688 and 678 series that so many older homes still run
- 2-prong plug matches the standard connector, so no rewiring inside the housing
Where It Needs Care
- Airflow matches the original spec but does not exceed it
- The fan blade needs a firm push onto the splined shaft — force it wrong and you can crack it
- Not a quiet motor in absolute terms, just quieter than a dead one
Match this to: a Broan 678 or N688 fan where the plastic wheel is the part that failed, not just the motor.
Skip it when: you need more airflow than the original fan produced — step up to a 70 CFM or 100 CFM motor further down this list.
3. BOJACK Bathroom Vent Exhaust Fan Motor Replacement Electric Motors Kit
The lightest motor here — under five ounces, which keeps the old bracket under far less strain.
Old bathroom fan brackets take on vibration every time the fan runs, and a lighter motor puts less stress on a bracket that has been holding up a fan since the last century. The unit runs at 50 CFM, 0.65 amp, 3000 rpm, 120 volt, 60 Hz, with a 1.75 inch by 3/16 inch shaft and a 6 inch wire with a 2-prong plug. Studs are 1 7/8 inch on center, matching the Kitchen Basics 101 spec, so both motors fit the same bracket pattern. UL certified, and the enclosed fan blade is a 4.5 inch flat/paddle style.
The headline complaint with this unit is orientation. Buyers consistently report the fan arrives assembled backwards and needs the fan shaft flipped before the motor will sit correctly in the housing. It is a ten-second fix once you know about it, but if you do not, you will spend an hour trying to figure out why the blade is pointed the wrong way. One long-time owner noted they easily reversed the motor from counter-clockwise to clockwise and marked the shaft for cutting with a dremel to fit an old fan that had been discontinued decades ago. Both of those are typical of old-home installs, and none of them mean the motor is bad — they mean the motor is adaptable.
The other piece worth knowing: this motor is designed for a housing that has the blade sit close to the opening. Shoppers say the shaft sticks out past the fan slightly, which may require drilling a clearance hole in a housing that was built for a shorter shaft, or trimming the shaft to length. If your old fan has a shaft that is proud of the blade, the BOJACK will drop straight in. If your old shaft sits flush, you may need to trim it — nothing difficult, just a detail to check before you close the ceiling up.
Why It Earns a Slot
- Lightest motor on this list at 4.6 ounces — gentlest on an old bracket
- Reversible shaft lets you run it in either rotation, which saves a dead-end install
- Moves enough air at 50 CFM to reduce moisture in a standard bathroom
Before You Order
- Shipped with the fan blade assembled backwards — flip the shaft before you install
- Shaft may run proud of the fan and need trimming or a clearance hole
- Not enough power for a run that has to push an exterior flap open against wind
Reach for this if: you have a lightweight old bracket and a shaft that sits proud of the blade, and want the swap that stresses the housing least.
Consider the C01575 instead if: the housing has a short shaft or you want the warranty coverage — this BOJACK carries UL certification but no stated repair period.
4. NOOTO S97012038 Bathroom Vent Exhaust Fan Motor Replacement
The motor you drop in when the old one has been shrieking at your bathroom for years and you just want silence.
Quiet is the whole reason people seek this one out. The NOOTO S97012038 runs at 0.29 amps on 120 volts 60 Hz, 3000 rpm, CCW, with a 6.37 inch wire and 2-claw plug. That 0.29-amp draw keeps the motor cool and quiet in extended use, and the fit covers Broan 659, 662, 663A-663E, 668, 688, 678, 678B, and 688A-688E models plus part numbers 97012041, 97012042, 97012040, and 97012028. It is a Copper-wound motor with a 4.5 inch by 1.06 inch fan blade and a 1.73 inch centre mounting bolt. If you have an old Broan ceiling fan that has been groaning through every shower, this is a straightforward path to quiet.
The install is the soft spot — soft as in easy. Buyers report the swap takes about ten minutes and drops onto the existing bracket without field modification, and the same connector plugs straight into the housing. There is a reason people describe the before-and-after with the same word the customers-say summary uses: the fan stops sounding like a haunted hallway. Reviewers also note the airflow feels the same as the original spec unit, not reduced. If your old fan was moving air properly before it failed and you want the identical feel with a quieter motor, that is what you get.
The catch to know about is that the housing has to be a Broan 659-series or the equivalents listed, and no amount of measuring will make it fit a non-Broan ceiling box without bracket work. And “quiet” here means quiet relative to the fan you are replacing — this is a 50 CFM motor, not a silent-flow unit, so you will still hear standard operation tone. If your old fan is an oversized or high-CFM unit, you want the larger Broan RE70BN or the Cylrod 100 CFM further down. But if yours is one of the Broan 659 through 688 fans, this one is nearly a drop-in.
Best-fit scenario: a Broan 659/662/663/668/688 ceiling fan whose original motor has been making a racket. The Copper winding and low 0.29 amp draw keep it running smooth and cool, and the 3000 rpm matches the original speed, so the swap is not a redesign — it is a straight replacement.
One spec to double-check: the mounting stud is 1 7/8 inch on center and the fan blade is 4.5 inches by 1.06 inches. If your old blade is a different profile, keep the original wheel and swap it onto the new shaft, because the two are a matched pair.
For the Broan crowd: if your housing says 659 through 688, this is the quiet, ten-minute swap.
Only wrong for: non-Broan housings with different bracket patterns, or anyone wanting more than the stock 50 CFM airflow.
5. PANDEELS 2 Pack Bathroom Fan Motor Replacement SM550
Two motors in one box — the buy that makes sense the moment your second bathroom fan starts rattling.
Every other pick here is a single motor, and this one is two SM550 universal bathroom fan motors in the same box. Both are 120 volt, 60 Hz, 50 CFM, 0.29 amp, 3000 rpm, with a 3/16 inch by 1.75 inch shaft and a 6 inch wire that ends in a 2-prong plug. Each motor ships with a 4.5 inch flat/paddle style fan blade included. Wattage is 34.8 watts, horsepower 0.04 hp, and the motor uses copper windings for the electrical path. The compatibility list covers the 65100, C65878, VFM100, E498-1, 82423K, K111, EM550, EM750 part numbers, and fits Nu-tone, Bro-an, Uppco, Bay Motors, Sears 569, and Dayton units.
What stands out about the reaction to this pair is how loud the surprise is — buyers expected an off-brand fit problem and got a drop-in instead. The customers most excited about it are people whose local hardware store sold them the wrong motor at the wrong price and who were convinced an unknown brand would not line up. The continuous-duty motor runs without overheating, and one owner noted the shaft orientation can be reversed to match the existing housing — the same flexibility as the C01575, in a two-pack. The one honest note on airflow: because this motor is designed for quiet operation, some people find it is not quite as strong at moving air as their worn-out original. That is the trade-off of the quieter motor.
What you actually do with this purchase is stock a spare. If you have two bathrooms, or two fans in one bathroom, the second motor is going to fail at some point — that is the pattern with continuous-duty small motors. The 2-pack means the second failure is a ten-minute fix instead of another ordering cycle. If you only have one fan, or your second fan is a different size, this becomes an extra part on a shelf — worth knowing before you commit to the larger box.
Why the Pair Wins
- Two motors in a single box — one fix now, one on the shelf for the next failure
- Confirmed 50 CFM and 3000 rpm match for the standard Broan/NuTone housing
- Copper windings and continuous-duty rating hold up to extended running
What to Know First
- Designed for quiet operation rather than maximum push, so it is not an airflow upgrade
- Only useful if both fans you are replacing are the same size and shape
- Off-brand parts need the same dimension check as any other fit — verify the shaft and stud measurements
Best for: households with two matching bathroom fans, where spending the same money on two motors beats one replacement plus a future reorder.
Overkill if: you only have one fan and no second matching unit — then a single motor like the BOJACK or C01575 costs less for the same install.
6. CLLOMAGY SMA-001 Bathroom Fan Motor for NuTone 8663RP / 8664RP
A replacement NuTone 8663RP motor that trades speed for quiet — and fixes the loose blade wobble while it is in there.
The CLLOMAGY SMA-001 is not the same animal as the 3000 rpm motors on this list. It runs at 1550 rpm on 120 volts, well below the standard bathroom fan speed, and that slower spin is the reason the customers-say summary highlights how quiet it runs. It replaces the S97017705 motor assembly in NuTone 8663RP, 8664RP, 671R, 672R, 8663RF, 8663RFT, 8663RLG, 8663RMAB, 8663RMBR, 8663RMS, 8663RMSA, 8673RP, VL3668RLG, VL3668RMAB, VL3668RMBR, VL3668RMSA, and VL3668RP — plus the Broan 750, 751, 752, and N750 fan series. It also replaces the JA2B104N / 86933000 part number. Shaft diameter is 3.3 inches in the spec sheet, and it ships as a full motor assembly with the mount hardware integrated, rather than a bare motor that needs a bracket swap.
The clever part is what the shaft arrangement does for noise. The old NuTone 8663RP fan had a habit of its blade sliding along the motor shaft, drifting out of position, and rubbing against the housing — which is exactly the kind of thing that turns a fan into a grinder. Owners mention the SMA-001 shaft holds the blade more securely, so it does not slide down over time. The same owners say the motor runs smoothly and quietly once fitted. The compatibility with the 8663RP and 8664RP is confirmed for the standard 9×9 housing, and it drops in without ceiling work or duct changes. Its 4-pole, 1550 rpm motor matches the original NuTone 8663RP housing design.
Here is the caveat. The low 1550 rpm means this motor is not a high-airflow mover in the way the 70 CFM Broan RE70BN or the 100 CFM Cylrod are — it is built to flow the same air as the NuTone 8663RP and 8664RP did, at a quieter tone. If your fan was designed for that NuTone housing, this is a clean replacement. If it was not, the 1550 rpm motor is not going to move enough air to help. Also: this is a genuine replacement motor assembly, not a universal part, so the fit is narrower but tighter — some model formats will not line up.
Where it wins: the design solves the specific failure on NuTone 8663RP and 8664RP fans — the impeller sliding down the shaft and rubbing. Slower 1550 rpm spin plus a secure shaft means a fan that runs like the day it left the factory.
Where it stays honest: it moves the same air as the original unit, no more. If your fan has always been a weak mover, this replacement will not change that — it just brings the fan back to its designed airflow at a lower noise.
Matching fans: if the housing label says NuTone 8663RP or 8664RP, the SMA-001 is the quietest replacement you can drop into that box.
Wrong pick if: your fan is an 8×8 or 9×9 that was never a NuTone 8663/8664 design — the slower 1550 rpm spec will not push enough air to solve a bathroom that already has moisture problems.
7. Broan-NuTone RE70BN 70 CFM Bathroom Exhaust Fan Replacement Motor Kit
The official Broan-NuTone upgrade motor — it turns a tired 50 CFM fan into a genuine 70 CFM mover.
This is the one kit on the list that legitimately increases airflow rather than matching what you had. The RE70BN runs at 70 CFM and delivers up to 40% more power for select 50 CFM fans, which is the difference between a fan that struggles to clear steam and one that swallows the shower moisture. It is a direct replacement for select Broan-NuTone 70 CFM fans along with a list of compatible 50 CFM models, and fits the Broan 670, 671, 688, 689, EC50, ECF50, EC70, ECF70, ECH600, E050, and E070, the NuTone 693, 695, 696N, 695C, 695CB, 696NC, 696NCB, 690AC, 696N0, and 6950, the Nautilus N671 and N688 (excluding 8 x 8-1/4 inch housings), and Aira VSBP50M, VSBP5XM, and VSBX50M. The kit includes the motor, blower wheel, 2 motor mounting plates, and hardware. Because it is a genuine Broan-NuTone part, the fit and wiring are the same as the fan it replaces — no plug swaps, no bracket filing.
The trade-off the summary flags is noise. It operates at 6.0 sones, which is a real measurable sound level — for scale, the fan you are replacing likely runs at a lower sone number. The reason it is louder is the reason it is better: more air in motion is more noise, and the same reviewers who note the increased volume also note that they are not bothered by it in a bathroom setting, or actually like the whooshing noise as background sound. It is the kind of trade-off where you get more venting at the cost of a noisier shower. For anyone whose bathroom mirror has steamed up too many times, that is a fair trade.
The install is where this pick pulls away from the generic motors. It is a no-wiring, no-drywall kit — genuine Broan parts, a 2-prong plug into the existing connector, and a motor plate that goes on exactly like the original. The one caution is the sharp edges on the mounting plates — a glove recommendation that comes up more than once on the review pages. So set a cloth on the workbench before you start, and you will be done in ten minutes with the fan back in the ceiling.
The Upgrade Case
- 70 CFM, up to 40% more power for select 50 CFM fans — a real airflow upgrade, not a match
- Genuine Broan-NuTone parts, so the fit matches the original fan without bracket work
- No wiring and no drywall cutting — 10 minutes or less once the plate is chosen
The Cost of More Air
- 6.0 sones means louder operation — the trade-off for the 70 CFM airflow
- Horizontal mounting plates have sharp edges — gloves recommended
- Does not fit 8-inch by 8-1/4 inch housings, which rules out some NuTone and Nautilus models
Right for you if: your bathroom has been fogging up and you want a genuine increase in venting capacity, not just a working fan again.
Skip this if: your bedroom or office sits right next to the bathroom — the 6.0 sone operation is the loudest motor here.
8. LEZYWONE 89850000 S89850000 Bathroom Exhaust Fan Motor & Blower Wheel
70 CFM that runs at a mild 3.0 sones — three times quieter than the Broan upgrade kit and moving the same amount of air.
Here is the head-to-head that matters. The LEZYWONE 89850000 moves 70 CFM at 3.0 sones. The Broan-NuTone RE70BN moves the same 70 CFM at 6.0 sones. Same airflow, roughly half the sound. The reason is a 3000 rpm, 120 volt 60 Hz C-frame motor turning a matched blower wheel, and the fact that the entire assembly is engineered as a pair instead of a motor dropped onto an existing wheel. The kit ships with the motor and the blower wheel together, so the balance is right from the start. Replacement part numbers are 89850000 and 89321000, and the fit list covers 665RP, 665RF, 668RP, 9965, 9965F, 605P, 605RP, 665P, 665F, 668P, 665SP, 9905, VH668P, 665RSP, 665ARP, 665BRP, 9905R01, 9965R02, 9965R03, VH668RP, VH665SP, VH665RSP, and J238-062-6404.
The kit does not include the mounting bracket, which is on purpose — you reuse the bracket from the original fan. That is the smart way to buy a replacement, because the original bracket fits your housing exactly, and the new motor plus the new wheel slide in together. Customers note the swap takes about ten minutes, the 3/16 inch flat-shaft unit plugs right into the existing connector, and the fan runs noticeably smoother after. It also comes with a one-year quality assurance period for non-human-related malfunctions. The 3.0 sone rating is the honest reason to buy this one over the Broan kit if you want the 70 CFM upgrade but do not want to hear every shower through the wall.
The honest limit is the housing fit. This motor and blower wheel combination covers the 605, 665, and 668 family — a specific Broan and NuTone era of ceiling fan — and it will not fit a different housing pattern. It is a wider fit list than the CLLOMAGY NuTone 8663RP motor, but narrower than the Kitchen Basics 101 C01575. So check the label, and if your housing is one of the numbers above, this is the 70 CFM, 3.0 sone combination to beat — with a fresh blower wheel coming in the box.
The Quiet 70 CFM Reason
- 70 CFM at 3.0 sones — the same airflow as the Broan 70 CFM kit at half the sound rating
- Motor and matched blower wheel ship together, so the assembly arrives balanced
- Reuses the original bracket, which means no ceiling work or drywall cut
Know Before You Buy
- Mounting bracket not included — you must have a reusable original bracket
- Fit is limited to the 605, 665, and 668 family of Broan and NuTone models
- Motor noise level still receives mixed reports at the room level, with some units louder than others
For this buyer: you want 70 CFM of real airflow through a 605, 665, or 668 housing and want it to arrive quiet — the 3.0 sone spec is the differentiator.
Try again if: your housing is not one of the 605/665/668 numbers, or if your original mounting bracket is no longer usable — this kit assumes both.
9. Cylrod 8664RP 8663RP Bathroom Fan Motor for NuTone 763RL / 769RL / 750
The airflow ceiling of this list — 100 CFM at 3.5 sones, with the widest NuTone compatibility of any motor here.
Double what the standard 50 CFM motors here push, and it does it at a moderate noise level. That airflow rating is what makes this the right pick for a larger bathroom ora bathroom that has always had moisture problems. It fits the NuTone 763RL, 769RL, 750, 751, 752, N750, 8663RP, 8663P, 8663DG, 8663F, 8663RF, 8663FL, 8673RP, 8673DG, 8673LG, 8673NLDG, 8673NLP, 8673NP, 8673P, 8814R, 6445RP, 671, 671R, 672, 672R, 6334, 6445, 371, and VL3668 series fans, and replaces the S97017703, S97017705, S97017706, S97017707, S97017709, 86933000, and S0503B000 part numbers. It uses a 3-pin power connector, ships as a full assembly with the motor, grounding clip, fan wheel, and motor isolation block, and comes with a 3-year service window — the longest stated repair period on this list, since the Broan kit and LEZYWONE carry one year and the C01575 carries two.
The upgrade argument on the Cylrod over the CLLOMAGY SMA-001 is the airflow. Both replace NuTone 86-series motors, but the SMA-001 runs at 1550 rpm and the Cylrod steps up to 1480 rpm with a 100 CFM rating against the SMA-001’s smaller output. Reviewers point out the swap fits the original housing exactly, the same connectors line up for both plugs, and the fan runs quiet and smooth afterward. The locking nut secures the light housing and cuts vibration noise, and the fan cage no longer slides on the spindle the way the original OEM unit would. Copper windings conduct and dissipate heat better than the aluminum windings in older OEM motors, per the maker’s description rather than a tested figure.
The honest structural note pops up in the reviews. Several owners flag that the screw dropping down for the light or grill fixture mounting is too short, and if your housing has a deep light assembly you may need a longer screw from the hardware store. Wear gloves during install — the metal edges are sharp on any of these motors. And of course the whole thing assumes your housing is one of the NuTone numbers above; the Cylrod has the widest NuTone compatibility here, but it is not universal.
Where It Leads the Field
- 100 CFM — more airflow than any other motor on this list
- 3.5 sones keeps the noise reasonable for that airflow level
- 3-year service window, the longest stated on this list
- Widest NuTone compatibility with the 763RL, 769RL, 750, and 86-series
The Real Caveats
- Mounting screw for the light or grill fixture is short and may need replacing
- Sharp metal edges on the assembly require gloves during install
- 1480 rpm is a slower spin than the 3000 rpm motors, so it moves air through volume rather than speed
For a big, steamy bathroom: the 100 CFM rating moves enough air that a mirror clears fast, and it does it at 3.5 sones rather than a racket.
One-part heads-up: the fixture mounting screw can come up short on some light housings, so have a longer one on hand before you close the fan back up.
Understanding the Specs
CFM: The Airflow Rating That Actually Matters
CFM stands for cubic feet per minute — how much air the motor pushes, and it is the single biggest number in a motor swap. A 50 CFM motor suits a standard half bathroom or a small full bath. A 70 CFM suits a larger bathroom or one with high moisture load. A 100 CFM motor is what you want if the walls run wet after every shower. The important reality is that CFM is the number written on your existing fan’s label, and swapping to a different CFM is not a free upgrade — the duct work behind the fan is sized for a range, and a 100 CFM motor on a duct sized for 50 CFM will push air back into the room rather than out of it. Match the CFM to your ducting before you order.
Shaft Sizing and Stud Spacing
The shaft is the metal rod the blade mounts on. It has two numbers that decide whether any of this works: diameter and length. The standard bathroom motor shaft is 3/16 inch in diameter across most of this list, but the length varies — 1.5 inches on the Ceoighe, 1.75 inches on the BOJACK and PANDEELS, 2.25 inches on the Kitchen Basics 101. Mounting stud spacing is usually 1 7/8 inch on center for Broan and NuTone housings. The way to check is simple: pull your old motor out, lay a tape on the shaft, and measure the stud-to-stud distance on the bracket. Those two measurements will save you more return trips than any other step in this project.
FAQ
Do I have to turn off the power before I replace a bathroom exhaust fan motor?
How do I know if my fan is 50 CFM or 70 CFM before I buy a motor?
Can I use a 3000 rpm motor in a fan that originally ran 1550 rpm?
What does the 2-prong plug on the motor wire actually connect to?
Why is my new fan motor making a clicking or rubbing sound?
Is a lower sone rating always better in a bathroom fan motor?
How long does a replacement bathroom exhaust fan motor actually last?
Can I replace just the motor or do I need to buy the whole fan unit?
Final Thoughts: The Verdict
For most bathrooms, the bathroom exhaust fan motors pick that will fit first try is the Kitchen Basics 101 C01575, because its replacement list covers the widest range of Broan, NuTone, Uppco, and Dayton part numbers, it matches the standard 50 CFM and 3000 rpm spec, and it carries the only two-year no-questions-asked warranty on this list. If your fan is a Broan 659 through 688 and you want the quietest possible swap, the NOOTO S97012038 is the ten-minute, low-noise choice. And if your bathroom has been fogging the mirror for years and you need more air, not just a working motor, the Cylrod 8664RP pushes 100 CFM — the biggest airflow number here — with a 3-year service window behind it.
The one thing worth doing right now is reading the label on the fan housing in your ceiling before you order anything, because CFM, shaft size, and stud spacing are the three numbers that decide whether this is a ten-minute job or a return trip. The Kitchen Basics 101 C01575 holds 4.6 stars across 900+ owners because its 1 7/8-inch stud spacing and 3/16-inch shaft fit the most common Broan and NuTone housings. — the manufacturers have already done the compatibility work for you, and matching the label is the last step.
How We Picked
We do not accept paid placement. Every pick is matched to a real buyer and a real use-case; we do not hands-on test units.
Sources & Methodology
Specifications: manufacturer listings and product documentation. Review insights: verified customer reviews, as of September 2026. Pricing: not shown on this page (it changes often); check the current price via the retailer link.
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