2025 BMW i5 Electric Drive Unit Coolant Leak Delivery Stop

BMW has issued a Delivery Stop, identified as SIB 17 01 25, for certain 2025 BMW i5 vehicles. This bulletin, which revises and replaces SI B17 01 25 dated April 2025, addresses a potential coolant leak from the electric drive unit. The BMW i5 coolant leak is a critical concern that requires immediate attention before vehicles can be delivered to customers.

Important Warnings for Owners and Dealers

This Delivery Stop carries several crucial advisories:

• Do not deliver to a customer any New, Certified Pre-Owned, or Used vehicle subject to a Delivery Stop until the vehicle has been properly repaired.
• Do not use or sell replacement equipment or parts that are subject to a Delivery Stop.
• Technicians are warned of a Risk of scalding: Repair work on the cooling system should only be carried out when the engine has cooled down.
• Never reuse used coolant; only use prescribed coolant and observe the correct mixture ratio during filling.
• Do NOT overfill the coolant system.

What's Being Addressed

This Delivery Stop affects 2025 BMW i5 (G60) sedan models produced between January 16, 2025, and February 17, 2025. The core issue is a potential coolant leak from the hose connecting the combined charging unit (CCU) to the front electric motor's housing. The specific point of concern is the motor end of this coolant hose.

Cause of the BMW i5 Coolant Leak

The root cause of the potential BMW i5 coolant leak has been identified as manufacturing flashing on the plastic fitting at the electric drive unit. This flashing can prevent the coolant hose from sealing properly, leading to a leak.

Symptoms

While vehicles are under a delivery stop, owners would not typically experience symptoms directly. However, if a vehicle were to be driven with this condition, the primary symptom would be a coolant hose leak at the electric drive unit, potentially leading to a visible coolant drip or reduced coolant levels.

Diagnosis

To diagnose the BMW i5 coolant leak, technicians follow a specific procedure:

1. The vehicle is connected to ISTA (Integrated Service Technical Application).
2. A short test is performed, and the coolant pump is activated via the component functional activation service function. This is done through the path: Vehicle Management > Service Functions > Electric Drive/cooling > "Fill and Bleed..." ABL (Automated Bleeding and Filling). This ABL activates the coolant pump for approximately 15 minutes to pressurize the system.
3. With the cooling system under pressure, an ultraviolet leak detection light is used to inspect the coolant line connection at the electric motor for any signs of leakage.

If no signs of a coolant leak are detected, no further repairs are necessary related to this specific issue.

Repair Procedure Summary

If a BMW i5 coolant leak is detected, the coolant hose must be replaced. The repair procedure, detailed in Repair Instruction 1712702 ("Removing and installing coolant hose, electric drive unit, front axle - electric drive unit, rear axle"), involves the following general steps:

1. Remove the acoustic cover in the front motor bay, as per Repair Instruction 1112025.
2. Perform the diagnostic steps outlined above to confirm the leak.
3. If a leak is confirmed, replace the electric drive unit coolant hose.
4. After replacement, ensure the cooling system is properly refilled with new, prescribed coolant, taking care not to overfill.

The repair code for this action is 0017270200, titled "G6x Checking coolant connection of electric drive unit, reworking if necessary."

Required Tools or Parts

Specific parts are required for this repair, including:

• 17 12 8 490 271: Electric drive unit hose (Quantity: 1)
• 07 14 7283812: Speed nut (Quantity: 2)
• 83 19 5A32851: HT-12 Antifreeze RTU (Bulk DN = 1/10 Liter) (Pre-mix) - Top up as needed
• 83 19 2468442: BMW Antifreeze/Coolant (DN = 1 Gallon Concentrate) - HT-12 - Top up as needed

Additional materials like various bolts, fluids, lubricants, and one-time use screws or seals may also be required, as specified in ISTA repair instructions or the Electronic Parts Catalog (ETK/AIR).

Owner Action

If you have ordered a 2025 BMW i5 produced between January 16, 2025, and February 17, 2025, your vehicle may be subject to this Delivery Stop. BMW is not notifying consumers directly for delivery stops. Instead, dealers are instructed not to deliver affected vehicles until the necessary inspection and repair, if needed, are completed. Please contact your BMW dealer to confirm if your specific vehicle is affected and to ensure the required service, identified by SIB 17 01 25, has been performed.

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Source: NHTSA ID: 11017503