2023-2024 BMW i5, i4, i7 Coolant Changeover Valve Delivery Stop

BMW has issued Service Information Bulletin SIB 64 02 24, a delivery stop for certain 2023-2024 BMW i4, i5, and i7 electric vehicles. This bulletin, Revision 2, replaces the earlier SI B64 02 24 dated January 2024. The delivery stop was effective January 25, 2024, and applies to vehicles produced between February 10, 2023, and January 12, 2024.

This measure addresses a potential issue with the coolant changeover valve, which may have impaired sealing capacity under specific conditions. The issue primarily affects the BMW i5 coolant changeover valve, along with those in the i4 and i7 models.

Important Warnings and What Owners Should Know

This is a delivery stop, meaning affected vehicles cannot be delivered to customers until the necessary repair is completed. BMW is not directly notifying owners via mail for this specific delivery stop, as it primarily impacts vehicles in dealer inventory. However, a customer information letter (B640224 Customer Information Letter.pdf) has been updated.

If you experience symptoms related to this issue, you will receive a "Check Control message" in your vehicle. The message states: "Drive. It is possible to continue driving. Must be checked by the Service Partner."

Symptoms

The primary symptom of this issue is a potential small coolant leakage. This leakage is most likely to occur under specific environmental conditions.

If the coolant changeover valve's sealing capacity is impaired, owners may notice a small amount of coolant leaking. This typically happens when outside temperatures are low, specifically below approximately -7 degrees Celsius (19 degrees Fahrenheit), and the vehicle has cooled to very cold temperatures, such as after overnight parking outside in cold weather. The vehicle's onboard system will alert the driver with a "Check Control message" if a coolant leakage is detected.

Trigger Conditions

The coolant changeover valve issue is triggered by low outside temperatures. The problem manifests when temperatures drop below approximately -7 degrees Celsius (19 degrees Fahrenheit).

This condition, combined with the vehicle having cooled to very cold temperatures, can impair the valve's sealing capacity. Prolonged exposure to such cold temperatures, for example, during overnight parking, increases the likelihood of the issue occurring.

Repair Procedure Summary

The repair involves replacing the affected coolant changeover valve. This procedure will be performed by an authorized BMW Center.

For vehicles that exhibit symptoms or display the "Check Control message", the coolant valve will be replaced. For vehicles that do not currently show any symptoms of a sealing capacity or coolant leakage issue, a check will be performed during the vehicle's first regular service visit to determine if any corrective measure is needed.

Owner Action

If you own a 2023-2024 BMW i4, i5, or i7 and experience a coolant leakage issue or see a "Check Control message" related to coolant, contact an authorized BMW Center immediately. The replacement of the coolant valve will be performed at no charge under your BMW New Vehicle Limited Warranty.

Even if your vehicle is not currently showing symptoms, it is advisable to mention Service Information Bulletin SIB 64 02 24 during your next scheduled service visit. The service center can then check if your specific BMW i5 coolant changeover valve, or those in the i4 or i7, requires attention.

---

Source: NHTSA ID: 11000510