The change happened at the end of August of 09, at least for E92 335i's it did. I researched the shit out of this when getting new wheels and wanted new sensors to go with them.
Cars with production dates up to 8.31.09 used the older style sensors. Cars with production dates starting with 09.01.09 use the later style. Both are 433mhz, but the data transmitted is different. They are not interchangeable.
My car is a 2010(pre LCI E92) with a production date of 09.09. I bought the later style sensors for it and they work.
This is what I bought from my purchase history
https://www.ebay.com/itm/HUF-TPMS-Se...d/132786959676