The Front Desk Review

Coway · Updated October 2026

Coway Bidetmega 400S Bidet Seat: price & specs

Coway Bidetmega 400S Bidet Seat. Every price and spec below is linked to its source and dated — no guesses.

Source: cowaymega.com verified ✓ corroborated verify in ledger

On the Recordsourced & dated · eligible

Seen at

Each figure is what that seller's own page published on the day we read it — not our price of record, and not a live quote. Follow the link for what it costs right now.

At Amazon

Amazon.com$388.99sold by Amazon.com(as of — Details)

Details

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.

The figure is the featured (buy box) listing at the moment shown, from Amazon's Creators API — not a page we read, and not necessarily the lowest listing.

CERTAIN CONTENT THAT APPEARS ON THIS SITE COMES FROM AMAZON. THIS CONTENT IS PROVIDED 'AS IS' AND IS SUBJECT TO CHANGE OR REMOVAL AT ANY TIME.

See it at Amazon.com Live price at the store — may differ from the dated listed price above. As an Amazon Associate we earn from qualifying purchases.
Coway Bidetmega 400S Bidet Seat — Coway
Image: cowaymega.com (© Coway)

Price history

$599
2026-07-25→0% on record2026-10-20

Is the Coway Bidetmega 400S Bidet Seat a good buy?

At $599, the Coway Bidetmega 400S Bidet Seat is #13 cheapest of the 17 bidet toilet seats we track, where the median is $479.99. On the spec sheet, its nozzle count of 1 is the lowest of the 17.

Specifications

Price (US)$599 Regular price $599.00 on cowaymega.com (Coway's US Bidetmega store). Amazon lists this exact model (Bidetmega 400S(E)) but priced in EUR (€383.10, localized), so US MSRP is taken from the manufacturer's $599.00.
BrandCoway
Released—
Water heating typeTankless
Nozzle materialStainless steel
Nozzle count1
Bowl shape fitBoth
Has air dryerYes
Has deodorizerNo
Has night lightYes
Has self cleaning nozzleYes
Control typeWireless remote
Seat weight capacity (lb)—
Dimensions (in)20.9 x 15.3 x 5.31

Source: cowaymega.com (read 2026-10-20) · corroborated by amazon.com (read 2026-07-10).

How we checked

Manufacturer store cowaymega.com confirms this exact model 'Coway Bidetmega 400S' at Regular price $599.00, with a Tankless Water Heating System (instant heated water), 'Stainless steel nozzles', auto cleaning nozzle (self-cleaning), heated seat and dryer, nightlight, an all-new wireless remote, fit for 'both round and elongated toilet bowls', and elongated Dimension (W x H x D) 15.3 x 5.31 x 20.9in — rendered as catalog L×W×H '20.9 x 15.3 x 5.31'. Amazon corroborates the exact identity (Model Number / Manufacturer Part Number 'Bidetmega 400S(E)') and repeats tankless heating, stainless self-cleaning nozzle, heated seat + dryer, nightlight and remote control; Amazon's buybox price is shown in EUR (€383.10, localized) so US MSRP is taken from the manufacturer's $599.00. No deodorizer is listed on either page (Triple Hygiene Care = WaterShield mist + auto-cleaning nozzle + UV light + soft-close lid) so has deodorizer=false; the wash uses a single positionable stainless wand (Amazon title 'Stainless Nozzle', descriptions say 'the nozzle') so nozzle count=1; only product weight (8.5 lb) is published, not seat weight capacity, so seat weight capacity (lb)=blank; neither page states a release year, so release date=blank.

Is the Coway Bidetmega 400S Bidet Seat worth it vs cheaper bidet toilet seats?

Coway Bidetmega 400S Bidet Seat against its closest cheaper and pricier bidet toilet seats on the specs that matter — every value sourced. See all 17 ranked

ProductPriceWater heating typeNozzle materialNozzle countBowl shape fitHas air dryer
Coway Bidetmega 400S Bidet Seat this$599TanklessStainless steel1BothYes
Bio Bidet BB-2000 Bliss$549—Stainless steel1BothYes
TOTO Washlet S7 (SW4726)$1279TanklessPlastic1BothYes

Frequently asked questions

How much does the Coway Bidetmega 400S Bidet Seat cost?

The Coway Bidetmega 400S Bidet Seat has a US price of $599 (Regular price $599.00 on cowaymega.com (Coway's US Bidetmega store). Amazon lists this exact model (Bidetmega 400S(E)) but priced in EUR (€383.10, localized), so US MSRP is taken from the manufacturer's $599.00.), as of 2026-10-20.

How does the Coway Bidetmega 400S Bidet Seat compare on price?

At $599, the Coway Bidetmega 400S Bidet Seat is #13 cheapest of the 17 bidet toilet seats we track, where the median is $479.99.

Has the Coway Bidetmega 400S Bidet Seat's price changed?

No — the Coway Bidetmega 400S Bidet Seat has held at $599 since 2026-07-25.

What is the lowest price the Coway Bidetmega 400S Bidet Seat has been?

The lowest we have recorded for the Coway Bidetmega 400S Bidet Seat is $388.99 on 2026-08-09.

Is now a good time to buy the Coway Bidetmega 400S Bidet Seat?

The Coway Bidetmega 400S Bidet Seat is currently $599; the lowest we have recorded is $388.99 (2026-08-09). Every price is dated, so you can judge it against its own history.

What are the Coway Bidetmega 400S Bidet Seat's key specs?

Coway Bidetmega 400S Bidet Seat (Coway): Water heating type Tankless, Nozzle material Stainless steel, Nozzle count 1, Bowl shape fit Both, Has air dryer. Full sourced spec sheet verified 2026-10-20.

Price of record: $599 at cowaymega.com, 2026-10-20. Other retailers may be lower — check the current price:

See it at Amazon.com As an Amazon Associate we earn from qualifying purchases.

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