2025 BMW X5 MIL Fault Codes BA0023 BA0008

Symptoms

Owners of affected 2025 BMW PHEV models may notice the Malfunction Indicator Lamp (MIL) illuminated on their dashboard. This illumination is typically accompanied by the storage of specific fault codes in the vehicle's control unit memory. Despite the warning light, AC charging functionality is expected to operate normally, and there should be no noticeable drivability complaints associated with this issue.

Fault Codes / DTCs

This issue is primarily identified by the presence of the following fault codes:

Code	Description	Module
BA0023	Control unit: internal fault (software group fault)	CCU
BA0008	CCU, internal coolant temperature sensor: Signal implausible	CCU

These codes indicate an internal software-related issue within the Combined Charging Unit (CCU).

Cause

The root cause of the illuminated MIL and the stored fault codes BA0023 and BA0008 is unfavorable software within the Combined Charging Unit (CCU). This software condition leads to the erroneous storage of these fault codes, even though the charging system may be functioning correctly.

Important Warnings for Owners

BMW has issued specific instructions regarding this issue to prevent unnecessary repairs and ensure proper communication with customers:

• Do not replace parts: "Do not replace any parts, as it does not provide a remedy and is therefore not permitted." Specifically, exchanging the Combined Charging Unit (CCU) will not resolve the problem if AC charging is working as designed and there are no charging complaints.
• Customer communication: "Please inform the customer that there is no operational problem with the vehicle, and that a software update is expected in March 2026. The vehicle should be released back to the customer, and it should be documented in the repair order so that the customer was informed of the situation."
• Dealership holding vehicles: "Vehicles should not sit at the dealership awaiting the software update."
• Roadside Assistance advice: If the fault occurs at home or public charging stations, owners should "Disconnect the charging cable," "Secure the vehicle and allow it to go to sleep, then start it again." The customer can then drive the vehicle to a workshop for the update without assistance.

Repair Procedure Summary

For vehicles exhibiting the BMW X5 MIL fault BA0023 or BA0008, the corrective action involves a software update. Technicians should first determine the vehicle's current I-level using AIR or the Key Reader/Aftersales Workplace (AWP) application. If the vehicle's I-level is lower than 26-03-500, the ISTA version containing the necessary software update is expected to be available around March 2026. Until this update is available, technicians should clear the fault codes BA0023 and BA0008. It is crucial to note that these fault memory entries may reappear multiple times before the permanent software fix is applied.

Owner Action

If your 2025 BMW X5, XM, or M5 PHEV displays the Malfunction Indicator Lamp (MIL) and you suspect the BMW X5 MIL fault BA0023 or BA0008, you should contact your authorized BMW dealership. Inform them about the illuminated MIL and mention BMW Technical Service Bulletin SIB 61 22 25. The dealership will check your vehicle's software I-level and clear the fault codes. Since the issue does not affect AC charging or drivability, you will be informed that a software update is anticipated in March 2026. You can continue to drive your vehicle normally until the update is available.

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Source: NHTSA ID: 11027772, SIB 61 22 25