Bosch SMS40C12GB Dishwasher, White

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
2 day delivery available
Express Delivery available
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

We want you to be happy with your purchase. If you're not, depending on the type of product, you can make free returns in the UK via John Lewis shops, Royal Mail, Collect+, or MyHermes. If you need to arrange collection of large or heavy items, call us on 03456 049 049. For international returns queries, call us on +44 1698 545 454. Find out more about returns.

You'll find returns information on your delivery note. Unless faulty, we'd like you to make your return within 90 days of purchase. Exceptions apply to certain products - find out more about our refund policy.


Find out more about returning products


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 (we are unable to connect to a 'hardwired' electricity point)
  • 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.

Q & As

Rated 4.4 out of 5 by 64 reviewers.
Rated 3 out of 5 by Expected better for the money Easy to use and quiet. I would give it 9/10 for cleaning providing you space plates out and 6/10 for drying. We have some quite thick dinner plates and the bottom rack spacing is too tight to allow proper cleaning, so we have to space these plates in every other slot. Also the drying is not that great, especially the top shelf - any cups with a slightly concave bottom will not be completely dry. We previously had a 10+ year old Zanussi which had no problems with this. The door opening/closing mechanism is a little bit odd, you just sort of pull it open but seems to be working fine so far. I think in general with dishwashers being eco-friendly is a worthy cause, but not at the expense of performance - at the end of the day if it doesn't clean and dry everything properly it's a bit of a waste of time. Hopefully it will last a good few years. 16 March 2015
Rated 2 out of 5 by Bosch SMS40C12GB Dishwasher Having previously owned a Bosch dishwasher, this machine is a substantial disappointment. It does not fully dry crockery and there is no "intense" setting with which to improve this (although such a function is described in the operating instructions). It is noisier than my last machine and the cutlery basket has been cheapened and is not as versitile as my last one (it will not accommodate some of my "ordinary" cutlery). The door must be opened by gripping with fingers and pushing with the thumb against the top of the cabinet to prevent the whole appliance being pulled forward every time the door is opened. Not the quality and functionality that I expect from Bosch. 03 March 2015
Rated 1 out of 5 by Worst dishwasher ever owned Bought this 2 years ago, mainly on the back of good reviews and brand. Within 2 years it's broken down 4 times. New pump fitted each time, 3 in last 6 months. Out of warranty tomorrow so it'll go straight in the bin. The problem is an electrical fault which short-circuits and trips the mains electricity. 27 December 2014
Rated 1 out of 5 by DO NOT BUY THIS I have had this dish washer (AVANTIE XX) which is the same as the classic for 28 mounts , as I am writing this, my washer is broken for the 5th time. And when it is working its rubbish, there is one not good thing to say about it. I have a Bosch washing and drying machine's and they are OK. The only reason I still have it is because I took out extra warranty. DO NOT BUT THIS MACHINE if I could give minus marks I would I will think twice about replacing this with a Bosch 11 January 2015
Rated 1 out of 5 by Save your money I've had one of these just 26 months, and it's died. Right from the beginning it never washed properly and the glasses were never sparking despite the best washing tablets, and rinse aid. Some times the machine would give error codes and stop half way through, why ? as nothing was done for it to work next time without any problems. 21 December 2014
Rated 5 out of 5 by Good choice Very happy with the product. I carefully read all the other reviews before deciding to buy this one and they were all very accurate and helpful regarding how to get the best out of it. It is very quiet, dishes come up very clean and the settings are simple to use - once you read the booklet as they are not that intuitive. Overall, happy to recommend as a good product at a good price. 04 November 2014
Rated 3 out of 5 by Rubbish Cleans Ok top but the top shelve never drys Bottom shelve comes off of the track every time you pull it out if it doesnt it comes off when you push it back in. The cutlery drawer is too fidley to use Not a patch on our old siemans I would expect it to be a lot better than a cheaper bottom of the range make for the money!! 03 November 2014
Rated 5 out of 5 by Soooo quiet & cleans beautifully..., I love it! I had to wait a long time to replace my dishwasher as my hubby didn't think the old one had quite 'died' yet lol. In the end I had to put my foot down and this is the one we decided on. Very please with our choice it is much quieter than our old one #which was also a Bosch# and cleans beautifully. No problems to relay to you apart from the fact that the design of the baskets is different to the old Bosch but I've just had to rethink how I stack the dishes to accommodate this change. I use the eco wash and it's perfect for all dishes. We love John Lewis - their staff are always friendly and accommodating and delivery/fitting staff always friendly and helpful too. Thank you! Gail xox 30 October 2014
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