Have you purchased those? I’m not sure they are OEM DJI parts since they are from China and the description states they “can perfectly work for DJI Phantom 4 /4Pro //4Pro+”. Quotes like that often mean the part is manufactured by a 3rd party.
I did, two of them came in what look like OEM packaging the other ones look like bulk package parts. I installed them and they’re working okay but I don’t know if they’re OEM nor do I know how to test if they’re OEM.
“Since they are from China” I thought all DJI stuff was from China. It says ‘Original 2312S Brushless Motor’ The feedback was positive for these motors. I personally would try them given the huge difference in price. I don’t know if there are specific markings on the old motors that you could compare with these. Sometimes that will be the giveaway. DJI has different suppliers for various components that go into these drones. Maybe even more than one supplier for the same part.
Yep, DJI parts are made in China. However, you forgot the second part of my comment above
My point was that there are many people selling parts that are “compatible with DJI drones”. When in the market for OEM DJI parts, it’s usually best to buy from DJI dealers or people who state the parts are OEM DJI parts.