Two bulletins issued for coolant changeover valve delivery stop, depending on the model (note these are BMW NA bulletin numbers, might be different in other countries):
SIB 64 02 24: bulletin for i4, i5, i7
SIB 64 03 24: bulletin for iX
Impacted production dates:
i4: May 3, 2023 - January 11, 2024
i5: July 6, 2023 - January 12, 2024
i7: February 10, 2023 - January 12, 2024
iX: March 10, 2023 - January 12, 2024
Situation:
The coolant changeover valve may develop a coolant leak when the outside temperatures go below 19°F (-7°C).
The vehicles operating systems would also need to be at that same low temperature (example: being parked outside, overnight in low temperatures).
The dealer is to inform the customer of the situation and have them sign the letter that @sundstrom posted above (so that letter is indeed genuine and comes from BMW corporate): https://www.i4talk.com/.../post-233361
Repair code is 0064230200 for all vehicles except iX. For iX it is 0064240200 (this is what will eventually show on BMW's recall website when looking up by VIN)
That's pretty much all the information that's useful for buyers. The rest is how much BMW dealers are to charge back to corporate for this "repair" etc.
