TOTO S350e

18 reviews



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Note:  For TOTO’s newest washlet, please see TOTO S550e.

The TOTO S350e Washlet has a contemporary design and comes with all the main features and functions you would expect in a premium bidet toilet seat.  Equipped with both posterior and feminine wash features – water temperature, water pressure, and the position of the spray can all be adjusted with the handy wireless remote control.  Speaking of which, the remote control has been totally redesigned too.  It is now rectangular shaped (so it fits nicely in one hand like a TV remote) and has been upgraded to include two user presets.  The user presets allow you to pre-program wash settings (e.g., water temperature, pressure, spray position) right into the remote.

Some of the other features you’ll find is a pre-misting feature which pre-mists the toilet bowl with water before use.  This make flushing more efficient and effective compared to flushing a dry bowl.  The use of innovative eWater Technology is another great addition.  This feature mists your toilet bowl with electrolyzed water which keeps the bowl cleaner and helps reduce the need for harsh chemical cleaners.  There’s also a new LED night light – very handy when using the restroom in the middle of the night.

Other features include an automatic opening and closing lid.  A heated toilet seat, warm air dry, occupied seat sensor, automatic air deodorizer, and power saving mode rounds out the rest of the main features of this TOTO Washlet.

Available in Cotton White and Sedona Beige.





TOTO S350e Washlet Features:

  • Wireless remote control (wall mounting kit included) with 2 User Presets
  • Automatic opening/closing lid
  • Tankless (instant) water heating system
  • Gentle aerated water stream
  • Self cleaning wash nozzle
  • Adjustable nozzle position
  • Adjustable water temperature
  • Adjustable water pressure
  • New eWater Technology mists the toilet bowl with electrolyzed water
  • Pre-misting feature wets toilet bowl surface before use
  • Water pulsation feature
  • Oscillating cleanse
  • Warm air dry
  • Temperature controlled heated seat
  • Slow closing seat and lid
  • LED night light
  • Occupied seat sensor
  • Powerful air deodorizer with carbon filter
  • Auto smart power saving
  • Self diagnose function
  • Quality approved by UL, CE, TUV

One Year Manufacturer’s Limited Warranty:

  • 100% Coverage of all parts and labor for the entire bidet for the first year from original date of purchase


Editor’s Review:

From the pioneering originators of the electric bidet seat comes the TOTO S350e washlet.  TOTO has been a leading innovator in the industry for over 30 years, and the S350e is the model at the head of the class.

You can read our in-depth official review of this seat herebidetsPLUS’ TOTO S350e Review.  Continue reading below for a less formal summary highlighting some of the unit’s main features.

The S350e uses a wireless remote control for operating its many features.  The remote is two-sided with buttons for the primary operations on the front, and the less often used buttons, e.g., adjustment controls, located on the back.  This design gives the front of the remote a cleaner look.  In addition to common operations such as rear wash, front wash, air dryer, oscillating mode and pulsating mode, the front of the remote also has two user presets at the bottom so you can recall your assigned preferences for two different users with these buttons.

As you would expect in a high end model, the S350e has adjustable water pressure, water temperature, nozzle position, adjustable temperature air dryer and heated seat.  It also has a tankless water heating system for continuous warm water.  Tankless water heating is more energy efficient than reservoir tank water heating, plus it provides continuous warm water without running out of heated water which can happen with the reservoir tank units.

An additional feature on the TOTO S350e is the “eWater” function.  This feature uses electrolyzed water, which is a commonly used disinfectant, to mist the toilet bowl before and after use to keep matter from adhering to the bowl.  This also cuts down on the need to use abrasive chemicals when cleaning.  Throw in the self-cleaning wash nozzle and the S350e makes it easy to keep yourself and itself clean and fresh looking.

Other non-washing features of note on the S350e include an LED night light and automatic open/close lid feature.  The unit has a sensor that is activated when you approach and automatically raises the lid.  After use when you leave the sensor’s range, the lid will then automatically close.  Definitely a cool high-end feature for a hands-free experience.

Another aspect of the S350e worth mentioning is the streamlined design of the unit.  The body of the S350e is much sleeker and more compact than other models with a narrower profile which gives it a clean, modern look.

All told, the TOTO S350e offers a premium bidet seat with all its high end extras.  It is truly a top of the line bidet seat from one of the industry’s most recognized names.


TOTO Models At-A-Glance:

Model Controls Key Feature Differences Accompanying Perks Just to Nitpick
TOTO S350e Remote Control Exactly the same seat at the TOTO S300e but comes with an automatic open/close seat and lid Happy wives don’t have to tell their husbands to put the seat down One year warranty is a bit short.  Other manufacturer warranties are longer
TOTO S300e Remote Control High-end TOTO model includes everything you would expect – tankless (on-demand) heating, night light, warm air dry, heated toilet seat Electrolyzed e-water mists the sides of the toilet bowl which helps minimize toilet bowl cleaning Contemporary lid style only available in S550e/S500e models
TOTO C200 Attached Panel C200 has a reservoir tank-type heater instead of tankless (on-demand) heater found on S350e/S300e Great price for a TOTO A bit bulky.  Almost twice the height of the premium models


New to TOTO?  A Brief Q & A:

Question Answer
What is the TOTO S350e? The TOTO S350e is an electronic toilet seat that provides a warm water wash after using the restroom.  TOTO actually trademarked the term “washlet” to describe their products but they are also commonly referred to as bidet seats or bidet toilet seats as well.
When was it released? The TOTO S350e was released in Fall 2012.  It is TOTO’s flagship model, replacing its predecessor the S300.  Notable upgrades include a new thinner design and also included is the addition of e-water (electrolyzed water) mists the sides of the toilet bowl which helps minimize toilet bowl scrubbing.
Where is the washlet made? The TOTO S350e is made in Malaysia.  Being a Japanese company, many customers assume everything TOTO makes is made in Japan.  But there were cost efficiencies in opening a manufacturing plant in Malaysia, and TOTO decided the washlet units would be made there.
Why would this model be a good choice? The TOTO S350e looks fantastic.  It has a slim profile and will blend in well with the rest of your toilet.  If aesthetics are paramount, the S350e would be a good choice.  Also performs quite nicely.  It’s a fine-tuned machine, as TOTO has been in the game a long time.


TOTO Product Naming Conventions:

TOTO uses internal product SKUs which differ from the branded product name.  For example, you may have heard the TOTO S350e referred to as the TOTO SW584#01.  For your convenience, here is a mapping table to understand TOTO’s naming conventions:

  Model SKU Color SKU Completed SKU
S350e Elongated Seat / Cotton White SW584 #01 TOTO SW584#01
S350e Round Seat / Cotton White SW583 #01 TOTO SW583#01
S350e Elongated Seat / Sedona Beige SW584 #12 TOTO SW584#12


TOTO S350e | TOTO SW584#01 Washlet – Product Comparison



Read:  bidetsPLUS’ TOTO S350e Review

View:  Owners Manual:  TOTO S350e | TOTO SW584#01 (.pdf)  large file, please be patient

See:    TOTO Product Specifications Sheet


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Q: What are the differences between the TOTO S350e and the S300e?

A: These two models from TOTO are hard to tell apart by looking at them, and that’s because they have the same body construction. They even have all of the same features except for one important difference: The S350e has an automatic opening and closing lid feature not available on the S300e. You can also raise and lower the seat of the S350e by pressing a button on the remote control.

Q: How does the e-water feature work?

A: E-water technology is an added feature to help keep the bowl of the toilet clean. It works by first spraying a pre-mist of water into the bowl to wet the surface to help prevent material from adhering to the surface of the bowl. When you are finished, the unit sprays another mist with electrolyzed water which acts as a disinfectant. The e-water feature is designed to reduce the amount of harsh cleaning chemicals needed to clean your toilet.

Q: How does the automatic lid feature work?

A: As mentioned before, the TOTO S350e includes an automatic opening and closing lid. A body sensor on the unit detects whenever you approach the toilet and will automatically raise the lid when you are within about a foot of the unit. After use, the lid will close after about 90 seconds once you have left the area of the sensor. If you wish to raise the seat, you can press the button on top of the remote to raise the seat too.

Q: Can the automatic lid feature be disabled?

A: Yes, you can disable this feature thru the remote control. Disabling would effectively turn your S350e into and S300e! And of course you could re-enable it later if you wish.

Q: What is the height of the bidet seat?

A: The body of the TOTO S350e has the narrowest profile out of all our electronic bidets. The height of the bidet at its highest point is 4” compared to other models that are between around 5.5” to 7” at their tallest point.

Q: Is the remote control easy to use?

A: Yes, it’s really easy and convenient to use. Although the remote is double-sided, the most commonly used buttons such as wash, dry and stop – are located right there on the front. The back of the remote control is used more to adjust settings such as water temperature, water pressure, sleeping hours, etc… and once you set those you rarely need to change them again. This makes the front of the remote less cluttered with buttons, and easier to use. The remote is really well thought-out and has a nice design.

Q: If I have guests come over, can they use the toilet like a normal toilet without using the bidet features?

A: Yes, if they don’t turn on any of the features - the bidet seat acts like any other toilet seat. So your guests can still use your toilet just as they would any other toilet.

Q: How does the installation work? Do I need a plumber?

A: All our bidet seats are designed for DIY (Do It Yourself) installation and the process takes about 30 minutes. To remove your old toilet seat, reach underneath the mounting holes and unscrew the bolts which keep your seat in place. Then affix the bidet’s mounting bracket and secure it by tightening a couple bolts. To hook up the water, all you’re doing is untightening some hoses and then re-tightening them back together. Anybody can do it – no special skills are required and you don’t need a plumber. All parts required for installation come included in the box.

Q: Can I install the TOTO S350e, on a non-TOTO toilet?

A: Yes of course! The washlet is compatible with all different types of toilets. You don't need a TOTO toilet for it to work. To check for compatibility, you just need a minimum of 1.75 inches from the front of the water tank to the center of the mounting holes. Please see our fitting guide which will walk you through a couple of easy measurements.

Q: What’s the best way to clean the unit?

A: We recommend you use mild soap and water. Avoid using harsh chemicals like Lysol or ammonia, as they can damage and discolor your seat over time. Wiping it down with a soft cloth, moistened with a little soap and water will keep your bidet looking like new. It is surprisingly easy to keep clean.

17 reviews