2025 BMW X3 Coolant Line Delivery Stop

Situation

BMW has identified a potential issue with the 2025 BMW X3 coolant line. Specifically, a coolant line located at the front of the engine could be improperly routed, leading to contact with the belt tensioner pulley. This is addressed under BMW Service Information Bulletin (SIB) 17 06 24.

Cause

The root cause of this problem has been traced back to improper routing of the coolant line during the vehicle assembly process.

Correction

To resolve the issue, technicians must inspect the 2025 BMW X3 coolant line for proper routing. If the line is found to be improperly routed, it must be checked for any signs of contact or wear marks from the belt tensioner pulley. Depending on the inspection findings, the coolant line may require replacement.

Repair Procedure Summary

The repair procedure involves several key steps to address the 2025 BMW X3 coolant line issue:

1. Locate the Coolant Line: Technicians will first locate the coolant line (part number 17 12 5 A2F DE3) and its retaining bracket under the hood, typically running along the driver's side of the engine.
2. Inspect Installation: The coolant line's installation in its bracket must be checked for proper seating. If it's correctly installed, no further action is needed.
3. Inspect for Wear: If the coolant line is not properly seated, it must be thoroughly inspected for wear marks or coolant leaks, especially at the point where it could contact the belt tensioner pulley. Any visible wear marks or leaks will necessitate replacement of the coolant line.
4. Replacement (if necessary): If replacement is required, technicians will follow Repair Instructions REP 17 12 615, which details the process for replacing the coolant hose of the charge air cooler auxiliary coolant pump. These instructions are expected to be available with ISTA 4.51.20 from January 29, 2025.
5. Reinstallation: If no wear marks are found, the coolant line should be properly installed into its bracket.

Required Parts and Materials

For repairs related to SIB 17 06 24, the following parts and materials may be required:

• Electric coolant pump line: Part Number 17 12 5 A2F DE3 (1, if needed)
• HT-12 Antifreeze RTU (Bulk DN = 1/10 Liter) (Pre-mix): Part Number 83 19 5A32851 (As required)
• BMW Antifreeze/Coolant (DN = 1 Gallon Concentrate) - HT-12: Part Number 83 19 2468442 (As required)

Additional small parts, fluids, lubricants, one-time use screws, nuts, and seals may also be needed, as specified in the ISTA repair instructions or Electronic Parts Catalog.

Important Warnings for Technicians

BMW has issued several critical warnings to ensure safety and proper repair during this delivery stop:

• Risk of Scalding: