Your model number can usually be found on a data plate on the back, side or underneath of the appliance.
Your model number will be a combination of letters and numbers, sometimes separated by a dash (-) or a slash (/).
A loose Upper Spray arm results from a problem with the holding nut and will affect the performance of your dishwasher.
If the nut is damaged or faulty then ForMySpares can be of help with this compatible replacement fixing nut that will resolve this issue.