Coway · Updated July 2026

Coway Bidetmega 400S Bidet Seat: price & specs

Name: Coway Bidetmega 400S Bidet Seat
Brand: Coway
Price: 599 USD
Availability: InStock

Check current price at amazon.com Recorded 2026-07-10 — live price may differ. As an Amazon Associate we earn from qualifying purchases.

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

Source: cowaymega.com verified 2026-07-10 ✓ corroborated verify in ledger

Coway Bidetmega 400S Bidet Seat — Coway — Image: cowaymega.com (© Coway)

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

At $599, the Coway Bidetmega 400S Bidet Seat is #11 cheapest of the 17 bidet toilet seats we track, where the median is $549. On the spec sheet, its nozzle count of 1 is the lowest of the 17, and its price usd of 599 is above the median 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.
Brand	Coway
Released	—
Price usd	599
Water heating type	Tankless
Nozzle material	Stainless steel
Nozzle count	1
Bowl shape fit	Both
Has air dryer	Yes
Has deodorizer	No
Has night light	Yes
Has self cleaning nozzle	Yes
Control type	Wireless remote
Seat weight capacity (lb)	—
Dimensions (in)	20.9 x 15.3 x 5.31

Source: cowaymega.com (verified 2026-07-10) · corroborated by amazon.com. 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 hasDeodorizer=false; the wash uses a single positionable stainless wand (Amazon title 'Stainless Nozzle', descriptions say 'the nozzle') so nozzleCount=1; only product weight (8.5 lb) is published, not seat weight capacity, so seatWeightCapacityLb=null; neither page states a release year, so releaseDate=null.

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 →

Product	Price	Price usd	Water heating type	Nozzle material	Nozzle count	Bowl shape fit
Coway Bidetmega 400S Bidet Seat this	$599	599	Tankless	Stainless steel	1	Both
Brondell Swash S1400 Luxury Bidet Seat	$549.99	549.99	Tankless	Stainless steel	2	Both
TOTO Washlet C5 (SW3084)	$673.71	673.71	Reservoir	Plastic	1	Both

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 2026-07-10.

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

At $599, the Coway Bidetmega 400S Bidet Seat is #11 cheapest of the 17 bidet toilet seats we track, where the median is $549.

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

Coway Bidetmega 400S Bidet Seat (Coway): priceUsd 599, waterHeatingType Tankless, nozzleMaterial Stainless steel, nozzleCount 1, bowlShapeFit Both. Full sourced spec sheet verified 2026-07-10.