Bosch SMS40C12GB Dishwasher, White

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Product information

With an A+ in energy rating, and two A ratings for washing and drying, the Bosch SMS40C12GB dishwasher will be welcomed into any home.

Precision engineering has resulted in a ServoLock door on this unit, which allows the door to close virtually by itself and with minimum effort on your part. A child lock protects from scalding, and tamperproof controls ensure washes are not interrupted by curious hands!

Thanks to the ActiveWater hydraulic water system, this dishwasher uses 12 litres of water per wash, and every single drop is used to the maximum. The SMS40C12GB has a 70°C intensive cycle to cut through and clean heavily soiled pots and pans, and if you are looking for more speed, a dedicated 45ºC quick wash will clean lightly soiled items in just 29 minutes.

The Bosch SMS40C12GB runs extremely quietly at just 48dB and features a 1-to-24-hour time delay option, so you can set it to run during lower energy tariff times. And when running at night, the integration of internal anti-flood technology gives you extra peace of mind, automatically cutting off the water supply if leakage or flooding occurs.

The upper basket is height-adjustable, even when fully loaded, and the SMS40C12GB features a removable Vario basket as a more flexible alternative to a cutlery basket, allowing you to effortlessly unload cutlery. With 3 different loading heights thanks to the Rackmatic height-adjustable top basket, and 4 foldable racks and shelves throughout the machine, a large variety of dishes can easily be accommodated. This appliance also includes a large item spray head that can be utilised for getting your oven shelves or barbecue grill clean.

Bosch guarantees that if an appliance is discontinued, its major components will be available for at least 10 years afterwards in the event of a part needing replacement.

  • A+ energy rating
  • Aquamix - Glass protection and water softening system for optimal results
  • Self-cleaning filter system keeps the dishwasher in good order without the need for you to periodically empty the filter
  • Vario basket system makes unloading cutlery easy
  • Silver baskets (without handle)
  • 3 stage Rackmatic height-adjustable top basket
  • Highly efficient water usage with the ActiveWater system
  • Residual heat drying system
  • DosageAssist dispenses detergent evenly
  • Automatic detergent detection
  • Aquasensor III, Load Sensor
  • Regenerative electronics
Adjustable racking Information Lets you move the racking around to fit large or awkward items
Automatic Load Adjustment Information Automatically adjusts water level for a smaller load, thus saving time and money
Delay Start
Yes - up to 24 hours
Delicate Wash Information A gentle clean, designed to protect delicate items, such as glasses
Digital display
H84.5 x W60 x D60cm
Dishwasher Size
Drying performance Information Graded on performance A - G, with A being the highest grade
Eligible for International Delivery
Energy Consumption Per Standard Cycle
Energy Rating Information Graded on performance A++ - G, with A++ being the highest grade
Estimated Annual Energy Consumption Information Typical annual amount used by a 4 person household
Estimated Annual Water Consumption
Model name / number
Noise Level Information How noisy, in decibels, the machine is. The lower the dB, the quieter the appliance
Number of Programs
4 programmes and 2 special options (Speed Perfect, Half Load)
Online Exclusive Information This product is not available in John Lewis branches
Overflow protection Information An anti-flood device prevents the machine from being damaged by flooding from the inlet pipe
Place Settings Information The number of items- plates, glasses and cutlery a dishwasher can hold, per table setting.
Program Sequence Indicator Information Tells you progress of washing cycle
Quick wash Information Speedy programme when you need items cleaned quickly
Time remaining indicator Information Tells you how long the programme's got to go
Wash performance Information Graded on performance A - G, with A being the highest grade
Water Consumption Per Standard Cycle


UK mainland delivery within 7 working days; may be longer for N Ireland, island and rural postcodes


Express 2 working day delivery to selected areas


International delivery not available


Dishwasher Disposal

The charge for this service includes removal and disposal of your old dishwasher for reuse or recycling.

Dishwasher Connection

The charge for this service includes:

  • Connection of the new appliance to a standard domestic water connection point within 1 metre of the installation location
  • Connection of the appliance to an existing 3-pin 13amp electrical point within 1 metre of the installation location
  • Connection of the appliance to an existing waste outlet within 1 metre of the installation location
  • A test wash to ensure the appliance is filling and draining correctly
  • The removal and disposal of all packaging

Please note: we are unable to install a freestanding dishwasher where your current appliance is an integrated dishwasher.


We want you to be happy with your purchase. If you're not, just return the products to us or to one of our shops. Unless faulty, we'd like this to be within 90 days of purchase. Exceptions apply to certain products - find out more about our refund policy.

Depending on the type of product, you can make free returns via our shops, Royal Mail (or courier collection for large or heavy items), Collect+ or via MyHermes.

Find out more about returning products

Q & As


Special offer

Bosch SMS40C12GB Dishwasher, White 4.7 5 35 35
Easy to use & very quiet. Very easy to use. There is a 29min quick wash function which still provides a good clean. The eco setting is 3 hrs 15mins but as it's a very quiet machine you can set it going before bedtime with very little disturbance. Overall - perfect for open plan living. 30 March 2014
Brilliant Bosch ! I bought this on-line after my old dishwasher broke after 5 years ( 5 years of sub standard cleaning). I have 3 kids and run a busy household, so needed a strong, sturdy and decent dishwasher . This dishwasher is quite simply super . I rarely have to use any other cycle except for the 29 minute short one as it washes everything efficiently ,including pots , pans and loads of dirty plates, etc after the family dinner . I am thrilled with this product and will never buy any other kitchen appliance except for Bosch again. 22 March 2014
Fine dishwasher Excellent machine. Good controls and good performance. Speed Perfect control cuts wash time in half. Auto Eco Setting fine.Quick Wash good- but best used with powder rather than tablets. Instruction book somewhat difficult to follow, but with alittle common sense there were no problems. 19 March 2014
Quick Cycle is great Bought this Bosch to replace a Hoover that gave excellent service for some 20 years. To date all works well, though we usually run it for plates, cups glasses, cutlery, etc, on the quick cycle, which is great. 18 March 2014
Great Dishwasher - Very Quiet I generally select larger white goods having read the "Which" reviews, and they were spot on, as Bosch lived up to all expectation. It was delivered at the time specified, and came well packaged. I was a little surprised that there was a bit of work to do on it before you can plug it in and use it, but I quite enjoyed taking off all the internal protection which gave me a chance to get to know it before it was time to use. A word of warning, you really do need to look at the pictorial instructions several times before you realise what you are meant to do! There are four washing options on this model, ranging from a 15 min prewash, 30 minute quick wash, 2hr 25 min intensive and 3hrs15mins for the Eco. The quick wash cleans well enough for every day items, so we only use the Eco late at night. The best thing though is how quiet it is! You really cannot hear much going on but boy does it clean. There are a few setting option with the baskets, plus a clever spray head that can be clipped on the internal water supply where you can clean large trays etc after removing the upper basket. All in all a very good dishwasher, that is very quiet. 13 March 2014
So quiet. This is a great machine, it really is super quiet. At first we kept opening it up to check if it was actually on! The fast wash is great for everything but the very dirtiest of dishes. The other cycle we use is the Eco option, again, exactly what says on the box! We definitely recommend this machine, 06 March 2014
Would recommend this dishwasher This dishwasher is much quieter than our previous Bosch . The quick 30 minute cycle is very useful and cleans very well. If this is a replacement for a Bosch dishwasher I would recommend keeping the funnel for adding salt to the dispenser and the wiggly glass holder strips as it doesn't come with these. Also I have kept my old cutlery holder as I like lots of spaces for my teaspoons. However, I would recommend this machine as a good buy. The two men from John Lewis who brought and fitted the machine were very helpful and professional. 04 March 2014
Excellent product from BOSCH! Absolutely love this dishwasher, very quiet, perfect amount of settings and most of all my dishes come out sparkling. The delivery guys were fantastic too - very friendly and helpful. Highly recommended - well done JLP! 03 March 2014
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