This genuine Dyson PCB (Power Control Board) assembly fits the Dyson DC41 and DC65/66 upright vacuum cleaners. This part is located in the lower duct assembly on the vacuum. Installing a new PCB assembly is not recommended for beginners, so get assistance from an experienced vacuum technician if possible. This isn’t the only part you may need to replace, so take a look at all of the Dyson upright vacuum parts we offer and get whatever pieces you need to fix up your machine.