2023-2024 BMW iX Coolant Changeover Valve Leak SIB 64 07 24

BMW has released Service Information Bulletin SIB 64 07 24 (Revision 1), which supersedes SI B64 07 24 dated May 2024, to inform technicians about a potential issue affecting the coolant changeover valve in certain 2023-2024 BMW iX Sports Activity Vehicles (internal E-series code i20). This bulletin outlines a required repair to prevent coolant leaks and ensures proper vehicle function.

Important Warnings

BMW has implemented a delivery stop for affected vehicles. Dealers are explicitly instructed:

"Do not deliver to a customer, a New, Certified Pre-Owned or Used vehicle subject to a Delivery Stop, until the vehicle is repaired. Do not use or sell replacement equipment/parts subject to a Delivery Stop."

Owners should be aware that vehicles subject to this delivery stop cannot be sold or delivered until the necessary repair is completed.

Symptoms

Quality checks have determined that the BMW iX coolant changeover valve leak may occur under very low outside temperatures, specifically those significantly lower than 32° F (0° C). Owners might notice signs of a coolant leak or reduced cooling system performance in cold weather conditions.

Diagnosis / Trigger Conditions

The primary trigger condition for this issue is exposure to very low outside temperatures. If a 2023-2024 BMW iX experiences temperatures significantly below freezing, the coolant changeover valve may develop a leak. Technicians will verify the campaign status using the vehicle's VIN in BMW's inventory systems.

Repair Procedure Summary

The correction involves replacing both coolant changeover valves. Technicians are instructed to follow specific repair instructions: 64 12 790 and 17 61 625, which detail the process for replacing the coolant changeover valve, including the valve associated with the high-voltage battery. The repair code for this action is 0064290200, labeled as "i20 Replace coolant changeover valve."

Required Parts and Materials

The following parts and materials are required for the repair:

Part Number	Description	Quantity
64 11 9 462 114	Changeover valve	2
07 11 9 906 123	Hexagon screw with washer	2
31 11 6 899 302	Multi-purpose bolt	14
61 27 9 487 465	Screw	4
83 19 5A32851	HT-12 Antifreeze RTU (DN = 1/10 Liter) (Pre-mix)	As needed
83 19 2468442	BMW Antifreeze/Coolant (DN = 1 Gallon Concentrate) - HT-12	As needed

Additional fluids, lubricants, one-time use screws, nuts, and seals, as specified in the ISTA repair instructions, must also be used.

Owner Action

If you own a 2023-2024 BMW iX, especially one produced within the specified dates, you should contact your authorized BMW dealer to check if your vehicle is affected by Service Information Bulletin SIB 64 07 24. This repair is covered under warranty. If your vehicle is part of the delivery stop, the repair must be completed before it can be delivered. For information on alternative mobility solutions during the repair, refer to SI B01 29 16.

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Source: NHTSA ID: 11005237