The coolant changeover valve may develop a coolant leak when the outside temperatures go below 19°F...
BMW technical service bulletin B640324 for 2023-2024 BMW Ix.
- Bulletin number
- B640324
- Component
- Engine and engine cooling
- Summary
- 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).
Owners of these vehicles have filed 4 complaints in the engine category.
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