BMW i4 2023–2024 — service campaign
Bulletin B640624 · NHTSA communication 11005236 · issued Jul 12, 2024
Service campaign
communication type
Engine
component
2023–2024
model years
5
vehicle entries
Official summary
Quality checks have determined that the coolant changeover valve may develop a coolant leak under very low outside temperatures (significantly lower than 32º F (0 C)).
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.