Philips Sonicare DiamondClean 9400 HX9917/89 Electric Toothbrush

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Product guide

Philips Sonicare DiamondClean 9400 HX9917/89 Electric Toothbrush

Philips Sonicare DiamondClean 9400 HX9917/89 is an app-connected electric toothbrush listing four cleaning programs, three intensity levels and a pressure sensor. Customer feedback is positive about cleaning and design but mixed on battery life and value, with durability concerns also reported.

At a glance

The listing specifies four cleaning programs and three intensity levels for adjusting the brushing routine.
A pressure sensor is listed, alongside app connectivity and intelligent brush-head detection in the title.
The manufacturer claims 62,000 movements and up to 20 times more plaque removal than a manual toothbrush. Its stated comparison is against a manual toothbrush.
A personalised progress report is described as an app feature.

Price

$211.44Save 34%

Reference price: ~~$318.83~~

Price checked: 13 Nov 2026

View offer Ahead of Black FridayExplore the selection

Often bought together

Philips Sonicare HX9094/88 A3 Premium All-in-One Original Replacement Brush Heads, Black, Pack of 4

$79.13

Pros and cons

Pros

Four programs and three intensity levels give users options to tailor their brushing routine.
A pressure sensor and brush-head detection are listed, while the app is described as providing a personalised progress report.
Customer feedback reports positive impressions of cleaning, including between teeth, and the design.

Cons

Customer feedback includes reports of the toothbrush breaking within the first six months, so buyers prioritising durability should weigh this concern.
Customer views on battery life and value are mixed.

Technical specifications

14 specifications

Identity and use
Brand	Philips
Model	Philips Sonicare Diamondclean 9400 Electric Toothbrush with App Hx 9917 Networked Cleaning
Intended age	Adult
Colour	Black
Cleaning programs	4
Head shape	Oval
Movement	Vibrate

Power and features
Power configuration	Corded Electric
Special feature	Pressure Sensor
Firmness description	Hard
Brush-head bristle material	Nylon
Handle material	Plastic

Dimensions and weight
Dimensions listed	11 x 17 x 25 centimetres
Weight listed	1.03 Kilograms

What to know before buying

Listing details to confirm

The title identifies this as a DiamondClean 9400, while the stated box contents name a DiamondClean 9000. The listing also calls the charging accessory a “charging glass” and gives its last item as “UBS”. Confirm the selected listing and exact kit before buying.

What’s in the box

DiamondClean 9000 toothbrushCheck selected pack
A3 premium all-in-one brush headCheck selected pack
G3 premium gum care brush headCheck selected pack
Charging glassCheck selected pack
UBSCheck selected pack

Check which accessories are included in your selected pack before buying.

Who is it for?

A good fit for

Adults seeking an electric toothbrush with multiple cleaning programs and intensity levels.
Buyers interested in pressure sensing, brush-head detection and app-based progress reporting.

Less suited to

Buyers who need confirmed battery-runtime details, as none are provided here.
Buyers who want an unambiguous model and package specification without checking the listed 9400-versus-9000 discrepancy.

Philips Sonicare DiamondClean 9400 HX9917/89 Electric Toothbrush · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.1 / 5 · 1,863 ratings

5 stars66%66%
4 stars11%11%
3 stars5%5%
2 stars4%4%
1 star14%14%

Customer feedback describes good cleaning, including in interdental spaces, and a positive-looking design. Battery-life experiences vary, value opinions are mixed, and durability concerns include reports of breakage within the first six months. These are customer impressions rather than verified product outcomes. The listing specifies multiple cleaning modes and an app, but gives no battery-runtime information to resolve the varied battery feedback.

Positive themes

Customers report effective cleaning, including between teeth.
Customers describe the design positively.

Negative themes

Some customers report the toothbrush broke within the first six months.

Mixed feedback

Battery-life experiences differ, with some reporting long life and others saying it falls short of expectations.
Value opinions vary, with some considering it worthwhile and others finding it pricey.

Frequently asked questions

How many cleaning programs and intensity levels are listed?

The listing gives four cleaning programs and three intensity levels.

Does the toothbrush include an app?

The title describes it as having an app, and the feature text mentions a personalised progress report. The listing does not provide further app requirements or compatibility details.

What is included in the package?

The stated contents list a DiamondClean 9000, two brush heads, a charging glass and “UBS”. This conflicts with the DiamondClean 9400 title, so confirm the exact kit for the selected listing.