2021-2023 BMW S63 Engine Coolant Leak TSB

BMW has released a Technical Service Bulletin (TSB) identified by NHTSA ID 10225107 concerning coolant leaks and associated warning messages in certain models equipped with the S63 engine. This TSB addresses instances where owners might notice coolant leaking from under their vehicle or receive a specific low coolant warning on the instrument cluster. This issue affects various 2021-2023 BMW models, including the X5, X6, M5, and M8.

Symptoms of a Coolant Leak

Owners of affected BMW vehicles may observe one or both of the following symptoms:

• "Coolant is leaking from under the car": Visible signs of coolant dripping or pooling beneath the vehicle.
• "low coolant warning": An alert displayed on the instrument cluster, often accompanied by the specific message "CC Message ID166".

These symptoms indicate a potential problem with the engine's cooling system, specifically related to the S63 engine. If you are experiencing these issues with your 2023 BMW X5 manufacturer_communication, it's important to have it inspected.

Diagnosis and Trigger Conditions

The primary trigger conditions for this TSB are the physical observation of a coolant leak and/or the appearance of the "CC Message ID166" low coolant warning. Technicians will typically perform a visual inspection to locate the source of the leak and may use diagnostic tools to confirm the low coolant level indicated by the warning message. The TSB, NHTSA ID 10225107, guides technicians through the proper diagnostic steps for the S63 engine cooling system.

Repair Procedure Summary

While the specific repair steps are detailed within the full TSB, the manufacturer communication indicates that the bulletin provides guidance for addressing the coolant leak issue. This typically involves identifying the component causing the leak within the ENGINE AND ENGINE COOLING system and performing the necessary repairs or replacements. The goal is to resolve the coolant loss and prevent the recurrence of the "low coolant warning" or "CC Message ID166" message. For your 2023 BMW X5 manufacturer_communication, the repair will be handled by a certified BMW technician.

Owner Action

If your 2021-2023 BMW X5, X6, M5, or M8 is exhibiting signs of a coolant leak or displaying the "CC Message ID166" warning, it is recommended to contact your authorized BMW dealership. Schedule an appointment to have your vehicle inspected and repaired according to the guidelines provided in TSB NHTSA ID 10225107.

Source: NHTSA ID 10225107