If it's anything like previous BMW platform introductions, additional trims come the following year. So 2028 model year.
I hope they move production to SC...
Inofficial timelines (those are start of production dates, not model years or market introduction) for additional models:
07/26: 40 and M60 xDrive added
11/26: 40 xDrive added
2027: X3 M (BEV)
Apparently, north american production will be done in the SLP plant in Mexico (where the 2 and 3 series are already producted) starting in the second half of 2026, while the Spartanburg plant in SC while retain the CLAR-based SUVs.
source:
https://g20.bimmerpost.com/forums/showpost.php?p=14820299&postcount=1
The 40 models will apparently have a smaller (80 kWh?) battery, as BMW NA says "The iX3 40 sDrive and iX3 40 xDrive will be available in early 2027, with an MSRP starting under $55,000 and estimated ranges slightly over 300 miles" (source:
https://www.bmwusa.com/vehicles/x-series/ix3/bmw-ix3.html)