This question is similar to the title to “V7 Animal 3 hole motorised brush head” which does not provide an adequate solution. The brush bar declared as a spare part is 4 prong, but the brush head only accepts 3 prong. I have bought a new brush head and it is again 3 prong. From a sustainability viewpoint, to purchase a brush head every time a brush bar wears out is unacceptable and I am surprised that Dyson has little consideration for a circular economy. The new brush head will be returned. There is no information provided by Dyson regarding 3 prong and 4 prong. but other parts’ suppliers advise that for the 3 prong, you have to buy the complete brush head. Since I know other versions (V8, V9, V10) of brush heads will work on my V7, I will have to progressively buy and return each one until I find the 4 prong version, I suppose. Or does anyone know which ones are 4 prong? Perhaps you could check your machines and let me know?
Cordless V7 Motorhead Brush bar - Part purchase - 3 Prong vs 4 Prong

Best answer by Anonymous
Hello
I had to do some digging to find an answer for you, regarding the difference in the 3-prong and 4-prong brush bars, but I was able to find some official clarification. In December of last year, a change was made to the internal fitting of the brush bar. Externally, there is no visual change, but as you and others have found, all the changes were internal, to the drive assembly and brush bar. These changes were made to ensure we could remain flexible with the supply chain.
The original Motorhead had a metal drive assembly, and the modified assembly is plastic. The brush bar from the original Motorhead will not fit on the modified one, and vice-versa. As such, the original brush bar is now a service-only fit part and it can no longer be sent out to our customers. While I suspect that’s not the answer you were looking for, that is what we currently have to work with.
Our service team may be able to obtain one for you. Please get in touch via our local WhatsApp channel, where one of our team will be happy to discuss the next steps. To do this, simply click on our Guides and manuals link, navigate to the ‘Contact us’ section of the page and start a WhatsApp conversation.
If you'd prefer, you're welcome to call the Dyson Helpline to speak with our experts directly. You can find their number in the ‘Contact us’ section of the page.
Best wishes,
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