Philips Sonicare DiamondClean Smart 9400 Electric Toothbrush, Sonic Toothbrush with App, Pressure Sensor, Brush Head Detection, 4 Brushing Modes and 3 Intensity Levels, White, Model HX9917/88

Philips Sonicare DiamondClean Smart 9400 Electric Toothbrush - New

4.2 (259)

Philips Sonicare DiamondClean Smart 9400 Electric Toothbrush, Sonic Toothbrush with App, Pressure Sensor, Brush Head Detection, 4 Brushing Modes and 3 Intensity Levels, White, Model HX9917/88

Overall Rating: 4.2 / 5 (average from multiple review sources, as of 18 Oct 2026)
Based on a total of 26,737 customer reviews from independent review platforms.

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The values are derived from publicly available retailer ratings from platforms such as Feefo, http://Reviews.io , Trustpilot, and others, and are aggregated monthly.

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pricehunter.co.uk cannot guarantee that published shop ratings originate from consumers who have actually made a purchase from the reviewed retailer.
Cheapest Total Price
Only 4 left in stock.
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£239.50
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Sonicare DiamondClean Smart 9400 Electric Toothbrush, Sonic Toothbrush with App…

Overall Rating: 1.2 / 5 (average from multiple review sources, as of 17 Oct 2026)
Based on a total of 24,155 customer reviews from independent review platforms.

Sources & Transparency:
The values are derived from publicly available retailer ratings from platforms such as Feefo, http://Reviews.io , Trustpilot, and others, and are aggregated monthly.

All brand names and logos are the property of their respective owners.

Notice:
pricehunter.co.uk cannot guarantee that published shop ratings originate from consumers who have actually made a purchase from the reviewed retailer.
Will usually delivered within 3 - 6 working days of receiving cleared payment.
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£369.99
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Philips DiamondClean Smart 9400 - Sonic electric toothbrush with 2 accessories and app - HX9917/88

Overall Rating: 1.3 / 5 (average from multiple review sources, as of 19 Oct 2026)
Based on a total of 1,019 customer reviews from independent review platforms.

Sources & Transparency:
The values are derived from publicly available retailer ratings from platforms such as Feefo, http://Reviews.io , Trustpilot, and others, and are aggregated monthly.

All brand names and logos are the property of their respective owners.

Notice:
pricehunter.co.uk cannot guarantee that published shop ratings originate from consumers who have actually made a purchase from the reviewed retailer.
1-2 days
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£399.99
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Philips Sonicare HX9917/88 DiamondClean Electric Toothbrush

Overall Rating: 4.2 / 5 (average from multiple review sources, as of 1 Oct 2026)
Based on a total of 365,606 customer reviews from independent review platforms.

Sources & Transparency:
The values are derived from publicly available retailer ratings from platforms such as Feefo, http://Reviews.io , Trustpilot, and others, and are aggregated monthly.

All brand names and logos are the property of their respective owners.

Notice:
pricehunter.co.uk cannot guarantee that published shop ratings originate from consumers who have actually made a purchase from the reviewed retailer.
3 to 5 days
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£400.00
Free Delivery
Philips Sonicare DiamondClean Smart 9400 Electric Toothbrush, Sonic Toothbrush with App, Pressure Sensor, Brush Head Detection, 4 Brushing Modes and 3 Intensity Levels, White, Model HX9917/88

Cheapest offer

Advanced sonic toothbrush for improved oral health: with the same brushing, it's up to 20 x more effective¹ and provides up to 15 x healthier gums² Personalise your brushing with this innovative electric toothbrush for adults: choose from 4 brushing modes and 3 intensity levels to meet your oral healthcare goals Real-time feedback: the light ring on the end of your handle will flash if you use too much pressure, so you can ease off the pressure and protect your teeth and gums Personalised guidance: connect your toothbrush to the Philips Sonicare app and receive personalised brushing guidance to maintain and improve your brushing habits #1 dental professional-recommended sonic toothbrush brand worldwide³: benefit from Philips expertise to keep your teeth and gums in the best condition The set includes: 1 x DiamondClean Smart 9400 sonic electric toothbrush, 1 x A3 Premium All-in-One brush head, 1 x G3 Premium Gum Care brush head, 1 x charging glass, 1 x USB charging travel case Contains UK 2-Pin bathroom plug for use in bathrooms. Packaging may vary.
£239.50
Only 4 left in stock.
Amazon-marketplace.co.uk

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Philips Sonicare DiamondClean Smart 9400 Electric Toothbrush, Sonic Toothbrush with App, Pressure Sensor, Brush Head Detection, 4 Brushing Modes and 3 Intensity Levels, White, Model HX9917/88 - Details

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We have found 4 prices for Philips Sonicare DiamondClean Smart 9400 Electric Toothbrush, Sonic Toothbrush with App, Pressure Sensor, Brush Head Detection, 4 Brushing Modes and 3 Intensity Levels, White, Model HX9917/88. Our price list is completely transparent with the cheapest listed first. Additional delivery costs may apply.

Philips Sonicare DiamondClean Smart 9400 Electric Toothbrush, Sonic Toothbrush with App, Pressure Sensor, Brush Head Detection, 4 Brushing Modes and 3 Intensity Levels, White, Model HX9917/88 - Price Information

  • Cheapest price: £239.50
  • The cheapest price is offered by Amazon-marketplace.co.uk. You can order the product there.
  • The price range for Philips Sonicare DiamondClean Smart 9400 Electric Toothbrush, Sonic Toothbrush with App, Pressure Sensor, Brush Head Detection, 4 Brushing Modes and 3 Intensity Levels, White, Model HX9917/88 is £239.50 to £400.00, with a total of 4 offers.
  • Payment methods: The online shop Amazon-marketplace.co.uk supports: Direct debit, Mastercard, Visa
  • Delivery: The shortest delivery time is Only 4 left in stock. working days offered by Amazon-marketplace.co.uk.

User reviews

Our reviews come from Trustami, a service that automatically collects, links, and verifies reviews from various sources such as Google, eBay, Amazon, and Trusted Shops. This gives users a transparent overview of a manufacturer's customer satisfaction.

4.2 out of 5 stars

259 Ratings
5 stars
162
4 stars
50
3 stars
17
2 stars
6
1 star
24
Amazon.co.uk Customer

Given the cost of this toothbrush, I assumed it would outperform and was built to last. My purchase lasted a total of 7 months and now I have to go through the replacement process. Completely unacceptable to charge premium prices for a device that lasts a short period of time.

via trustami

Amazon.de Customer

After two years my Philips Sonicare DiamondClean Smart 9400 suddenly broke – and that’s just outside the warranty period. For a toothbrush that sits in the premium segment and costs around £200, that’s simply disappointing. The cleaning performance was fine during that time. What’s even more frustra…

via trustami

Amazon.co.uk Customer

I've been using these since before Sonicare was bought by Philips in 2000! They do a great job - as you'd hope, for £200!!! However, Philips's quality control has slipped, based on my own experience, and other reviews. They don't last as long as you'd hope, given the price - maybe 4/5 years before s…

via trustami

Amazon.it Customer

Don't buy it! It will break (because it will break, it's basically made of ricotta) and Amazon won't replace it. It might be 4, 6 months, but it will break. They'll have you send it in for repair, keep it for a month and then tell you it can't be repaired. Terrible experience with the whole chain, f…

via trustami

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