2022-2024 BMW X3, X4 KAFAS Camera Hood Deformation TSB

BMW has released Service Information Bulletin SIB 66 13 23 (Revision 1), superseding the previous SI B66 13 23 dated September 2023, to address an issue with KAFAS camera hood deformation. This problem specifically affects 2022-2024 BMW X3 and X4 models equipped with the 5AU Driving Assistant Professional option. The BMW X3 KAFAS camera hood deformation can lead to various driver assistance system malfunctions.

Symptoms

Owners may experience various Check Control messages (CCM) indicating a restricted function or unavailability of their vehicle's driver assistance systems or functions. During diagnosis, technicians may find one or a combination of the following fault memory entries:

• 800AC4 - "Camera calibration failed"
• 800AC8 - "Permanent calibration error"
• 800A24 - "Temporary software fault"
• 800ABE - "KAFAS camera: Field of view permanently faulty"

These messages and fault codes are direct indicators of the underlying issue related to the BMW X3 KAFAS camera hood deformation.

Cause

The root cause of the problem is that the material of the KAFAS 4 High camera hood cannot withstand the temperatures it reaches during operation. This leads to deformation and distortion of the KAFAS camera hood, which then interferes with the camera's proper function and field of view.

Diagnosis

When a customer reports Check Control messages related to driver assistance systems, technicians should perform a diagnosis using ISTA. If the fault codes mentioned above are stored in the fault memory, the next step is to visually inspect the KAFAS camera hood for deformation. If the hood is deformed, the repair procedure should be followed. If no deformation is found, further ISTA diagnosis is required.

Repair Procedure Summary

The correction involves replacing the deformed KAFAS camera hood and modifying the existing KAFAS windshield bracket. The general steps for addressing the BMW X3 KAFAS camera hood deformation are:

1. Initial Diagnosis: Confirm fault codes with ISTA and visually check for KAFAS camera hood deformation.
2. Disassembly: Remove the interior mirror trim, the interior mirror itself, the KAFAS camera, and the KAFAS camera hood to gain access to the retaining lug.
3. Modification: The mounting point for the KAFAS camera hood must be adjusted. This involves using a grinding tool, such as a Dremel, to shorten the entire surface of the retaining lug by 1.3 mm. The area must be masked, deburred, and thoroughly cleaned afterward.
4. Replacement and Reassembly: Install the new KAFAS camera hood, ensuring it makes full contact with the holder, especially in the modified retaining lug area. Reassemble the vehicle components.
5. Final Assessment: Reassess the KAFAS system operation to confirm the repair is successful.

Required Parts

To perform this repair, the following KAFAS camera hood part numbers may be required, depending on the specific vehicle model:

• 51 31 5 A93 179: For F97 (X3 M Sports Activity Vehicle) and G01 (X3 Sports Activity Vehicle) front windshield trim.
• 51 31 5 A9A 552: For F98 (X4 M Sports Activity Coupe) and G02 (X4 Sports Activity Coupe) front windshield trim.

Important Warnings

Before performing this repair procedure and submitting a claim, technicians must review the Repair History (Claims) section in the Warranty Vehicle Inquiry (WVI). This is to confirm that a prior claim for this one-time repair procedure has not already been submitted and accepted for the specific vehicle.

Warranty Information

This repair, identified by Repair Code 5131900200 (F97 G01 LCI windscreen scattered light lens hood deformation), is covered one time under the terms of the BMW New Vehicle Limited Warranty for Passenger Cars and Light Trucks. Technicians should refer to the bulletin for specific labor operations and flat rate unit (FRU) allowances, including operations like 00 73 898 for replacing the lens hood and reworking the holder.

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NHTSA ID: 11024718