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Coway Bidetmega 400E 400 Elongated, White

3.4 out of 5 stars 197 ratings

$419.95 with 12 percent savings
Typical price: $477.23
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Size: Elongated
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Color White
Product Dimensions 23.25"D x 8.25"W x 19"H
Material Stainless Steel
Brand Coway
Item Weight 7.91 Kilograms

About this item

  • Coway Bidetmega 400’s unique i-wave technology is designed to fit every body for comfortable cleaning experience.

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Customer reviews

3.4 out of 5 stars
197 global ratings

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Customers say

Customers find the bidet easy to install and appreciate its heated seat feature. However, the material quality receives negative feedback, with customers reporting that the plastic hinges crumble over time. Moreover, the functionality and water pressure get mixed reviews - while some say it works well, others report issues with the remote control and weak water pressure. Additionally, comfort and durability are mixed aspects, with some customers finding it uncomfortable and reporting durability issues. Value for money is also mixed, with some customers considering it a great bidet while others say it's not worth the cost.

AI-generated from the text of customer reviews

7 customers mention "Ease of installation"7 positive0 negative

Customers find the bidet easy to install, with one mentioning they thoroughly read the detailed use instructions.

"...Hubby says installation was easy. It came with several fitting options for water connections, and we had an electrical outlet nearby...." Read more

"...We also bought a new toilet to go with this new bidet seat. Installation was pretty easy as well. Every home should have this bidet seat!" Read more

"The plumbing installation was simple but I had to watch the video to attach the seat as the manual doesn't really show detail...." Read more

"...So I broke down and bought this Coway 400E. Installation was a breeze but where it failed for me was that the position of the front area cleans is..." Read more

4 customers mention "Air temperature"4 positive0 negative

Customers like the bidet's temperature features, with one mentioning the heated seat for cold days and another noting the heated spray.

"...are "pros" to this bidet, including the seat warmer, comfort level, heated spray, and night light...." Read more

"...It even has a heated seat for those cold days. Treat your sensitive heinie right and get one of these!" Read more

"...The heating element in the toilet seat makes for a nice warm seat in the winter time in the northwest, however this also makes the plastic brittle..." Read more

"...adjustable stream pressure, temperature, and air temperature" Read more

25 customers mention "Value for money"14 positive11 negative

Customers have mixed opinions about the bidet's value for money, with some finding it amazing while others say it's not worth the expensive cost.

"...for me were preheated water, self-cleaning, nice looking, and a reasonable price...." Read more

"...The blue night light, looks cool, but not worth the cost. 3 stars because there is nothing functionally wrong with it, but nothing wow about it...." Read more

"...great, and the features themselves work well and are comparable to much more expensive models. I'd give it five stars for that...." Read more

"...At this price point, I definitely want something that’s gonna last more than two years." Read more

22 customers mention "Functionality"13 positive9 negative

Customers have mixed experiences with the bidet's functionality, with some finding it works well while others report issues with the remote control and drier not working properly.

"...also a great bidet seat but the Coway one is by far the best one in overall performance...." Read more

"...3 stars because there is nothing functionally wrong with it, but nothing wow about it...." Read more

"...It functions really well, and comparable Toto models are way more expensive. I have no idea of those are built any better...." Read more

"Works well, it has good features, but after two years it is cracked in so many places. When using you get pinched by the top cracks...." Read more

12 customers mention "Water pressure"8 positive4 negative

Customers have mixed opinions about the bidet's water pressure, with several noting it is weak.

"...Key features for me were preheated water, self-cleaning, nice looking, and a reasonable price...." Read more

"...Water pressure is weak, I upgraded from a manual bidet that has much stronger water pressure...." Read more

"There are "pros" to this bidet, including the seat warmer, comfort level, heated spray, and night light...." Read more

"...on this thing from water pressure to water temperature to drying fan speed/temperature. It even has a heated seat for those cold days...." Read more

5 customers mention "Comfort"3 positive2 negative

Customers have mixed opinions about the bidet's comfort level.

"...I use the medium pressure setting on the remote - it feels and washes fine...." Read more

"...with, it has now cracked on both sides of the seat and is starting to pinch my butt cheeks when I sit on it...." Read more

"There are "pros" to this bidet, including the seat warmer, comfort level, heated spray, and night light...." Read more

"...The main thing I don't like is how uncomfortable the seat is...." Read more

23 customers mention "Material quality"0 positive23 negative

Customers report issues with the bidet's material quality, noting that it cracks easily, breaks within a few years, and is made of cheap plastic.

"...I suspect it cracked due a combination of faulty construction material and heat as it had a seat warming feature...." Read more

"...Second, I was concerned about durability the moment I opened the package, and for good reason...." Read more

"Works well, it has good features, but after two years it is cracked in so many places. When using you get pinched by the top cracks...." Read more

"...mediocre a product as it was to begin with, it has now cracked on both sides of the seat and is starting to pinch my butt cheeks when I sit on it...." Read more

4 customers mention "Durability"0 positive4 negative

Customers report issues with the bidet's durability, with one customer noting it stopped working conveniently after two years of use.

"...Seems to be a very expensive bidet when you consider its short life...." Read more

"...skin sensor (turns the bidet on when you sit on it) went out conveniently right about 2 years...." Read more

"Worked great for the first 10 months. Then it started to have issues. The pressure wasn't as strong and it wouldn't turn on right away...." Read more

"...expensive to install and unreliable product" Read more

Avoid, Plastic hinges brittle and will break in a few years
1 out of 5 stars
Avoid, Plastic hinges brittle and will break in a few years
I'm satisfied with this Bidetmega 400 initially, however, after 3 years of normal use, the plastic hinges on the seat started to crumble and break. This is just a normal use of lifting the seat up and down. The warranty only covers 1 year, and there are no serviceable parts. Coway only offers 30% off coupon to purchase a new one on their site at a full MSRP $599.I have had other bidets ranging from 5 - 12 years (Toto, Daelim Dobidos, Cleansense) and they all work just fine.Stay away from this brand unless you plan to purchase another seat in 2-3 years.
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Top reviews from the United States

  • Reviewed in the United States on April 4, 2020
    Size: ElongatedVerified Purchase
    I've wanted a bidet toilet seat for years, but the recent TP shortage tipped us over the edge. Hubby says installation was easy. It came with several fitting options for water connections, and we had an electrical outlet nearby. His only minor gripe was Installation instructions came after Use instructions in a single manual. I'm OK with that, since this is my first EVER bidet seat I greatly appreciated & thoroughly read the detailed Use instructions.

    Key features for me were preheated water, self-cleaning, nice looking, and a reasonable price. I find the remote control reasonably intuitive and think this seat has plenty of bells & whistles without going crazy. Mainly, I am truly surprised at how much cleaner I am than with toilet paper. For a woman, this is more like the clean after your shower - Yay! Being cleaned with water takes a little getting used to, but I don't see myself ever returning to TP only. The wash cycle is 1 min and the dry cycle is 2 mins. The dry cycle feels a bit long. I use a little TP to pre-dry before the dry cycle, and sometimes skip it entirely - your choice. I’d guess I use about 70% less TP than before.

    We have town water and have had no problem with the bidet water pressure. I use the medium pressure setting on the remote - it feels and washes fine. Hubby mentioned the Coway site warned if you had low water pressure this would cause problems with your bidet. I’ve used this for about a week now and truly love it. At first I thought I might use the Coway bidet as a short-term measure - until the price of the high-end bidet I had my eye on came down. Now I intend to stick with it long-term, it’s that good.

    A quick mention about registering the product online - for a 1 year extended limited warranty. Take a photo of the serial number on the back of the toilet seat, it’s hard to see once installed. I got several ‘invalid serial number’ form rejections. Turns out the serial number is printed on two lines, you have to combine them. The format that worked for us was: 12345 1234567 R1 (sample only)
    44 people found this helpful
    Report
  • Reviewed in the United States on March 7, 2022
    Size: ElongatedVerified Purchase
    The media could not be loaded.
    I purchased this model in February 2020 at the start of COVID-19 after having to wait in long lines for TP. Initially I was very happy with it until I purchased a different brand for another bathroom. I didn't want to spend another $550. I quickly discovered that the least expensive model, the Ivyel J-2R did a much better job cleaning for less money. So, I chalked up the Coway purchase, as live and learn.

    Then about 3 months ago, I discovered that the Coway seat cracked on both sides. See the linked video. I should say that both myself and wife are toned athletic people, so it didn't crack due to heavy weights. I suspect it cracked due a combination of faulty construction material and heat as it had a seat warming feature.

    To the credit of Coway, the maker, who replaced the cracked bidet with a new bidet of the same model after doing everything in their power other than saying we abused it to suggest that we did. They suggested that if the seat wasn't completely centered on the bowl, resulting in more pressure on one side could cause the cracking. My seat was centered, so that was not it. They made me take and send them many pictures and a (linked) video to prove no abuse. But what was the worst was that they made us go without a seat for about 3 days while they (Coway) waited to get verification of the shipment of the old seat before sending out the new seat. Luckily, I had an old seat in the garage, or we would either not use the toilet or buy a new seat to use in the interim.

    So, we have been using the new seat for a couple of months now and the other least expensive bidet is still the go to. And the real problem is that for the next couple of years we will live with the possibility of the new Coway bidet also cracking.
    19 people found this helpful
    Report
  • Reviewed in the United States on July 19, 2022
    Size: ElongatedVerified Purchase
    I was planning on buying another bidet seat which turned out not to be available for my area...I am glad because this Coway bidet seat is by far the best one.

    We have a Moen as well which is also a great bidet seat but the Coway one is by far the best one in overall performance.

    The water spray control (3) different modes, the fan also has 3 speed levels, the bidet cleaning, etc.

    We also bought a new toilet to go with this new bidet seat. Installation was pretty easy as well.

    Every home should have this bidet seat!
    2 people found this helpful
    Report
  • Reviewed in the United States on December 3, 2021
    Size: RoundedVerified Purchase
    The bidet itself is great, and the features themselves work well and are comparable to much more expensive models. I'd give it five stars for that.

    The problem is the seat itself. First, this is definitely a tight fit on most US toilets - mine met the size requirements but the opening extends almost beyond the rim of the toilet itself. It works, but you have to adjust how you sit on it.

    Second, I was concerned about durability the moment I opened the package, and for good reason. As far as I can tell the seat is just made of plastic, and it isn't particularly thick. Maybe in Korea an above-average-sized person can sit on this without a problem, but I think anybody who is above-average size (even without being obese) would be likely to damage the seat fairly quickly even with fairly careful use. This device is awfully expensive if it only lasts a year or two, as was the case for me.

    The product itself doesn't list any weight limits, but I'd be hesitant to use this if you're over 170lbs, at least not without quite a bit of care. Below that I'm guessing you could treat it like any other toilet seat.

    It functions really well, and comparable Toto models are way more expensive. I have no idea of those are built any better. I'd be pretty hesitant to spend this much on a seat again unless it were built to commercial standards.

    I'm guessing it works much better in Korea where average heights seem to be much lower.
    8 people found this helpful
    Report
  • Reviewed in the United States on August 20, 2022
    Size: ElongatedVerified Purchase
    Works well, it has good features, but after two years it is cracked in so many places.

    When using you get pinched by the top cracks. No one has stepped on it and our family is fairly small people.

    At this price point, I definitely want something that’s gonna last more than two years.
    Customer image
    4.0 out of 5 stars
    Was great…until it started cracking

    Reviewed in the United States on August 20, 2022
    Works well, it has good features, but after two years it is cracked in so many places.

    When using you get pinched by the top cracks. No one has stepped on it and our family is fairly small people.

    At this price point, I definitely want something that’s gonna last more than two years.
    Images in this review
    Customer imageCustomer imageCustomer image
    21 people found this helpful
    Report

Top reviews from other countries

  • Aria Moonstone
    5.0 out of 5 stars Great quality
    Reviewed in Canada on December 26, 2021
    Size: ElongatedVerified Purchase
    It works as well as one would expect. This was purchased to replace one that broke. The installation was very easy, and it works really well. I’m very happy with this purchase.
  • Phillips
    1.0 out of 5 stars Bought 2, Both seats cracked.
    Reviewed in Canada on January 17, 2024
    Size: ElongatedVerified Purchase
    Bought first one in 2021 in just over a year the seat was cracked so bad it pinched my cheeks every use. No warranty after 1 year. Bought a second one in 2023 as I liked the bidet and assumed they’d have fixed the seat issues. Second seat has started cracking in exact same spots both sides as first seat did.
    I’m out well over a Grand and will soon be bidet less. What a joke.
    Customer image
    Phillips
    1.0 out of 5 stars
    Bought 2, Both seats cracked.

    Reviewed in Canada on January 17, 2024
    Bought first one in 2021 in just over a year the seat was cracked so bad it pinched my cheeks every use. No warranty after 1 year. Bought a second one in 2023 as I liked the bidet and assumed they’d have fixed the seat issues. Second seat has started cracking in exact same spots both sides as first seat did.
    I’m out well over a Grand and will soon be bidet less. What a joke.
    Images in this review
    Customer image
  • Kevin Murphy
    2.0 out of 5 stars Weak water pressure
    Reviewed in Canada on April 28, 2022
    Size: ElongatedVerified Purchase
    Water pressure too weak