2023-2024 BMW X7 Third Row Seat Bowden Cable Change SIB 52 14 23

BMW has released Service Information Bulletin (SIB) 52 14 23, Revision 2, to address a change in the third seat row backrest Bowden cable routing for certain 2023-2024 BMW X7 models. This bulletin supersedes the previous version, SI B52 14 23, dated November 2023. The update provides important information regarding the use of new, shorter Bowden cables and the necessary installation procedures.

This bulletin is particularly relevant for BMW X7 owners with the power third row seat (option code SA4UB) who may experience issues related to the third seat row backrest or potential noise complaints.

Symptoms

Owners of affected 2023-2024 BMW X7 vehicles may notice a change in the behavior or fitment of the third seat row backrest. The original Bowden cables have been replaced with shorter versions due to a manufacturing change. While no specific symptoms like warning lights are mentioned, the bulletin notes that harness routing was added to eliminate a possible noise complaint.

Important Warnings

Owners and technicians should be aware that all replacement parts are now the new "shortened cable" design. This design requires a specific new routing procedure when installed in vehicles produced prior to February 2023. Failing to follow the updated routing procedure could lead to improper function or fitment of the third seat row backrest.

Cause of the Bowden Cable Change

The change in the Bowden cable routing for the third seat row backrest was implemented during production starting in February 2023. This manufacturing update resulted in the use of shorter Bowden cables compared to the original parts. The SIB 52 14 23 addresses the implications of this change for service and repair.

Repair Procedure Summary

The repair involves installing the new, shorter Bowden cables using a revised routing procedure. The full procedure is detailed in an attached document, B521423 Replace bowden cables G07 3SR.pdf, which accompanies SIB 52 14 23. Technicians must refer to this procedure to ensure correct installation, especially for vehicles manufactured before February 2023.

For diagnosis of head restraint and/or backrest issues or noise complaints related to the third seat row, technicians should consult Service Bulletin B52 09 20. Further details on networked seats are available in Service Bulletin B52 23 19.

Required Parts

To determine the exact part numbers needed for a specific vehicle, the VIN/chassis number must be entered into BMW's ETK or AIR systems. This ensures the correct parts are ordered based on the vehicle's specific equipment and options. The general part numbers for the Bowden cables are:

• 52 30 5 A1E 228: Inboard Bowden Cable (up to 2 needed)
• 52 30 5 A1E 229: Outboard Bowden Cable (up to 2 needed)

Claim Information

Repairs addressing a verified defect in materials and/or workmanship, as described in SIB 52 14 23, are covered under the terms of the BMW New Vehicle Limited Warranty for Passenger Cars and Light Trucks. Dealers should follow established warranty policies and procedures for labor, parts, and sublet costs. For detailed claim procedures, refer to SI B01 01 20 or B01 07 20.

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Source: NHTSA ID: 10246301