First dealership i took it to Today told me, they they have not seen Or heard anything like it before On an x3. And that it would take 3-4 weeks to take a look at it. So I left there.
second dealership(much bigger dealer and has at least 6 techs in service) I took it to was very helpful and jumped on it when I arrived onsite.
service manager and writer both came out and said they hadn’t seen anything or heard anything like the noise on any other x3.
so we unloaded the x3 and took it to a bay where a “their can am brp tech” was andhe narrowed it down to the starter/clutch/sprague or combination of all as the that is where the rattle is concentrated right under the oil filter and the rattle resonates through the starter.
also the starter seems to spin backwords when the unit is turned off.