NHTSA ID Number: 11032738
Manufacturer Communication Number: B521923
TSB/Document Date: 2026-05-18
Summary
In vehicles equipped with the second row 60% / 40% split seat, the flex cable assembly can come out of the seat rail mechanism (circled). This stops the forwards and backwards travel of the seat.
5/8/26, 10:06 AM
52 19 23_SECOND ROW 60/40 SEAT RAIL FLEX CABLE REPLACEMENT
SIB 52 19 23
SECOND ROW 60/40 SEAT RAIL FLEX CABLE REPLACEMENT
2026-05-04
This Service Information Bulletin (Revision 4) replaces SI B52 19 23 dated January 2026.
What’s New:
Parts Section – Part Number 52 20 5 A9C 055 Cable Lengths added
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THIS REPAIR IS MOBILE FRIENDLY
THIS REPAIR IS REMOTE SOFTWARE UPGRADE (RSU) FRIENDLY
MODEL
E-Series
Model Description
G07
X7 Sports Activity Vehicle
Affected Option Code
7-passenger vehicle equipped with second row
60% / 40% split seat
SITUATION
In vehicles equipped with the second row
60% / 40% split seat, the flex cable
assembly can come out of the seat rail
mechanism (circled). This stops the
forwards and backwards travel of the seat.
CAUSE
Something has mechanically jammed the seat movement on one or both sides of the seat.
See how an obstruction can cause the flex cable to pop loose.
See VIDEO BV52 06 24 Flex Cable Pops Out
CORRECTION
Locate and remove the foreign object, if still present.
Determine the extent of the damage per the various Situations below, then make the appropriate repair.
There are numerous parts kits available, so you don’t have to replace the entire seat rail assembly.
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52 19 23_SECOND ROW 60/40 SEAT RAIL FLEX CABLE REPLACEMENT
SITUATION 1
The plastic SLV Motor Carrier tray is broken.
The plastic SLV Motor Carrier
tray is available with
flex shaft kits.
SITUATION 2
The flex cable is damaged.
If the flex cable end has been damaged, do not
reuse it.
Replace only the damaged flex cable assembly
instead of entire seat rail assembly.
Install a new locking clip as per situation 3.
NOTE: The locking clip will be available in July
2025. Until then reuse the existing locking clip.
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52 19 23_SECOND ROW 60/40 SEAT RAIL FLEX CABLE REPLACEMENT
SITUATION 3
The Flex Cable has popped loose from the Ushaped flex shaft hooks. If the flex cable end is not
damaged, check the U-shaped hooks on the plastic
carrier.
If the U-shaped hooks are damaged, replace SLV
Motor Carrier tray (see situation 1)
If the U-shaped hooks are not damaged, reinstall flex
cable into U-shaped hooks and replace locking clip
The locking clip is shown in ETK to be used in
conjuncture with flex cable repairs.
NOTE: The locking clip will be available in July
2025. Until then reuse the existing locking clip.
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52 19 23_SECOND ROW 60/40 SEAT RAIL FLEX CABLE REPLACEMENT
NOTE: If this locking clip has come loose due to the
cable popping free, it should be replaced.
PROCEDURE
1- It is recommended that this repair be done with the seat still assembled in the vehicle, though there is
limited access and visibility.
See VIDEO BV52 07 24 Flex Cable Install
ONLY IF needed for greater access and visibility:
the seat can be removed from the vehicle.
the seat cover can be removed as per Repair Instructions:
Replacing the left seat surface cover 52 25 212 for the 60% driver’s second row seat
Or
Replacing the right seat surface cover 52 25 214 for the 40% passenger second row seat
2- If damage is found to the Plastic SLV Motor Carrier tray, it should be replaced.
3- See procedure attachment for instructions on how to replace these cables on the 60% driver’s second
row seat. The procedure is similar for the 40% seat.
NOTE: The attached procedure shows replacement of one of the flex cables both with and without electric
motor removal.
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52 19 23_SECOND ROW 60/40 SEAT RAIL FLEX CABLE REPLACEMENT
To replace the long flex cable, you do not need to remove the electric motor from the carrier;
just pivot it up on one side.
To replace the short flex cable the electric motor may have to be removed from the carrier.
The locking clip, as shown in ETK, is to be replaced in conjuncture with flex cable repairs.
NOTE: The locking clip will be available in July 2025. Until then reuse the existing locking
clip.
When replacing the flex cable(s) you must time the seat rails from side to side.
A ‘helicopter’ type noise occurs when the seat rails are out of timing.
Reference procedure attachment for instructions on timing the seat rails.
4- If the seat is removed from the vehicle, the seat mounting bolts must be replaced and torqued in
sequence. See Service Bulletin B52 23 19.
5- These networked seats are described in detail in Service Bulletin B52 23 19 which contains information
on all relevant seat bulletins.
PARTS INFORMATION
To determine the part numbers that apply to the specific vehicle being repaired, enter the VIN/chassis
number into either ETK or AIR, this will consider the specific equipment and/or options that are fitted to the
vehicle.
Part Number
52 20 5 A9C 054
52 20 5 A9C 055
Description
Kit flexible shafts (40% seat passenger rear)
Kit flexible shafts (60% seat driver’s rear) Cables should
be 261mm and 283mm in length
Drive, Longitudinal seat adjustment (60%) includes SLV
Motor Carrier tray
Drive, Longitudinal seat adjustment (40%) includes SLV
Motor Carrier tray
Mounting kit clips
52 20 7497460
52 20 7497461
52 20 5B69BD1
And if needed:
07 14 7424979
Quantity
1 if needed
1 if needed
1 if needed
1 if needed
1 if needed
(Seat mounting) Hexagon screw with flange
4
CLAIM INFORMATION
This Service Information Bulletin provides technical, diagnosis, and repair-related information.
Damage and/or issues caused by outside influences/foreign objects are not covered under the BMW limited
warranties.
FEEDBACK REGARDING THIS BULLETIN
Technical Feedback
Warranty Feedback
Parts Feedback
To submit feedback for the technical topic of this bulletin: Submit your
feedback in the rating box at the top of this bulletin
To submit feedback for the CLAIMS section of this bulletin: Submit an IDS
ticket to the Warranty Department, or use the chat available in the
Warranty Documentation Portal
To submit feedback for the PARTS section of this bulletin: Submit an IDS
ticket to the Parts Department
Supporting Materials
picture_as_pdf Attachment B52 19 23 FLEX CABLE RR.pdf
Videos
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52 06 24
52 07 24
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TSB/Document ID: B521923
Replacement Service Bulletin Number:
MFR Communication Date: 2026-05-04
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: SEATS
MFR Component System:
MFR Component Subsystem:
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