2021 BMW Coolant Pump Fracture SIB 11 05 21

BMW has released Service Information Bulletin SIB 11 05 21, a service action concerning a potential issue with the mechanical coolant pump in various 2021 BMW models. This bulletin, which is Revision 4 and supersedes SI B11 05 21 dated April 2022, outlines a procedure to replace the mechanical coolant pump to prevent a serious engine problem. The primary concern is a potential BMW coolant pump fracture that could lead to further complications.

Symptoms

The core issue identified in SIB 11 05 21 is that the belt pulley on the mechanical coolant pump may fracture. Should this occur, the engine drive belt can come off the coolant pump. This detachment not only affects the coolant pump's operation but also impacts the alternator, potentially leading to a loss of charging and engine overheating.

Important Warnings and What Owners Should Know

BMW emphasizes that this service action should be performed on all affected vehicles before customer delivery. If a customer has already taken delivery, the procedure should be completed the next time the vehicle is in the shop. Owners can determine if their vehicle requires this service action by checking in AIR, the "Service Menu" of DCSnet (Dealer Communication System), or with the Key Reader; the status will show as "Open" if the service is needed.

Dealers are cautioned against using part number look-ups in ETK (EPC) by VIN or model for the specific parts listed in the bulletin. Doing so could result in incorrect parts being invoiced and installed, which may delay claim payments. Only the part numbers specified in the bulletin should be used.

Repair Procedure Summary

The repair procedure for the BMW coolant pump fracture involves replacing the mechanical coolant pump. Technicians are instructed to follow Repair Instruction 11 51 000, which details the steps for removing and installing the coolant pump. A specific tightening sequence is crucial for the coolant flange bolt:

1. Tighten the bolt to 12.5 Nm.
2. Loosen the screw 360 degrees (one full turn).
3. Tighten the screw again to 12.5 Nm.

It's important to note that the bolt hole for the coolant flange may not be threaded, requiring the self-tapping screw from the original water pump to be reused.

Required Parts

To address the BMW coolant pump fracture, the following main parts are specified. Other small parts, such as screws, nuts, and seals, should be selected from the Electronic Parts Catalog based on the vehicle type and invoiced under the special defect code.

• 11 51 5 B4A 144: Coolant pump (48 V mild hybrid technology)
• 11 51 8 482 260: O-ring
• 11 53 8 674 931: O-ring (28.7x2.5)
• 11 53 8 678 045: Seal (29.8x4.6x2.2)
• 11 11 8 664 905: Shaft seal (55x68x8) (TC Approval not required)
• 83 19 2 468 442: Coolant (as needed)

Warranty and Claims Information

Reimbursement for this Service Action, identified by Defect Code 0011160600 (G0x G2x G3x B58C B58D Replacing coolant pump), will be processed via normal claim entry. There are different Flat Rate Unit (FRU) allowances depending on whether the vehicle is 48 Volt equipped or non-48 Volt equipped. Vehicles with 48 Volt systems receive a higher FRU allowance.

Several labor operations are available for claiming, including those for replacing the coolant pump (00 70 985, 00 70 425) and those that also include deleting fault memory if a "CC message already present" warning was displayed (00 70 986, 00 70 426). If the vehicle's repair was already handled through another repair or technical campaign, specific labor operations (00 70 987, 00 70 427) apply.

Sublet Code 4 allows for reimbursement of up to $150.00 for bulk materials like BMW Antifreeze/Coolant. Additionally, Alternative Mobility Solution (AMS) expenses for vehicle owners qualify for reimbursement under Sublet Code 2.

Owner Action

If you own a 2021 BMW X5, 430i, 330i, X7, X6, or 530i, it is recommended to check with your authorized BMW dealer to see if your vehicle is affected by SIB 11 05 21. You can also check your vehicle's status in AIR, the