NHTSA ID Number: 11023249
Manufacturer Communication Number: B521225
TSB/Document Date: 2025-09-22
Summary
A clicking noise can be heard from one or both front seat backrests. This noise is heard when leaning against the backrest of the seat or while the vehicle is cornering.
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TSB/Document ID: B521225
Replacement Service Bulletin Number:
MFR Communication Date: 2025-09-18
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: SEATS
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
9/21/25, 9:13 PM
52 12 25_CLICKING NOISE FROM SEAT BACKREST
SIB 52 12 25
CLICKING NOISE FROM SEAT BACKREST
☒
☐
2025-09-17
THIS REPAIR IS MOBILE FRIENDLY
THIS REPAIR IS REMOTE SOFTWARE UPGRADE (RSU) FRIENDLY
MODEL
E-Series
U10
U11
Model Description
X2 Sport Activity Coupe
X1 Sport Activity Vehicle
Affected Option Code
Vehicles without lumbar support
SITUATION
A clicking noise can be heard from one or both front seat backrests. This noise is heard when leaning
against the backrest of the seat or while the vehicle is cornering.
CAUSE
The hooks for the back support mat mounting spring move against the seat backrest frame.
CORRECTION
Apply 2 cable straps per seat to lock the spring
hook(s) so they can’t move relative to the seat
backrest frame. The cable straps are only
required in the two locations circled in red.
PROCEDURE
Copyright ©2025 BMW
of North America, Inc.
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1/5
9/21/25, 9:13 PM
52 12 25_CLICKING NOISE FROM SEAT BACKREST
Remove the seat backrest cover and foam
cushion to access the seat backrest frame.
Secure the fastening spring hooks of the flex
mat to the seat backrest frame utilizing cable
straps (2 per seat)
Once the cable straps are installed, reinstall the
seat foam and cover; and reevaluate the noise
on a test drive.
PARTS INFORMATION
Obtain and confirm the part numbers for your specific vehicle by entering the chassis number in either ETK
or AIR which considers specific equipment and/or options.
Part Number
BMW Group
PN
Or:
Locally Sourced
Description
Cable Strap(s) Locally Sourced
Cable Strap(s) (Sublet at cost, no handling)
Quantity
2 or 4
Sublet 2 or 4
CLAIM INFORMATION
Covered under the terms of the BMW New Vehicle Limited Warranty for Passenger Cars and Light Trucks.
Copyright ©2025 BMW of North America, Inc.
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9/21/25, 9:13 PM
Repair Code:
52 12 25_CLICKING NOISE FROM SEAT BACKREST
5210143900
Backrest frame / spring mat backrest, front seat Unpleasant
noises
Diagnosis
Labor Operation
52 00 001*
Description
Seat- locating complaint(s) (Work time)
Labor Allowance
WT FRU
Diagnosis Worktime Flat Rate
2 FRU
Or:
00 58 500*
And, with the diagnosis above that applies to your center together with the work below that was performed.
Place Holder 52 NN NNN: Enter the VIN into AIR, go to “Optional equipment fitted at the factory”
section (Number 450 and higher) to determine the vehicle’s seat option and the specific labor
operation codes that apply.
Repairing One Side
Labor
Operation
Description
Labor Allowance
52 NN NNN
Replacing (for access only) the seat cover for the driver's
seat (Main work)
As applicable
Replacing (for access only) the seat cover for the driver's
seat (Plusposition work)
As applicable
Replacing (for access only) seat cover for (front)
passenger seat (Main work)
As applicable
Replacing (for access only) seat cover for (front)
passenger seat (Plusposition work)
As applicable
Work time to install two (2) zip ties
1 FRU
Or:
52 NN NNN
Or:
52 NN NNN
Or:
52 NN NNN
And:
52 99 000
Or
Repairing Both Sides
Labor
Operation
Description
Labor Allowance
52 NN NNN
Replacing (for access only) the seat cover for the driver's
seat (Main work)
As applicable
Replacing (for access only) the seat cover for the driver's
seat (Plusposition work)
As applicable
Or:
52 NN NNN
And:
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52 12 25_CLICKING NOISE FROM SEAT BACKREST
52 NN NNN
Replacing (for access only) seat cover for (front)
passenger seat (Plusposition work)
As applicable
Work time to install two (2) zip ties per seat (Four)
2 FRU
And:
52 99 000
If you are using a Main labor operation code for another repair, then use the Plusposition labor operation
codes.
Work time labor operation codes 52 00 001 and 00 58 500 are not considered Main labor operations.
Sublet – Bulk Supply Materials (RO and Claim Comments Required)
Sublet Code 4
Reimbursement for the repair-related bulk supply materials
(Non-BMW group part number at cost)
As applicable
Enter this material cost in sublet and itemize the amount on the repair order and in claim comment section.
(*) Based on which one applies to your center, please refer to SI B01 01 20 or B01 07 20 for the applicable procedure for
documenting, claiming, and explaining, on the RO and in the claim comments, your diagnosis work time (WT), job/repair
work time (WT), and the vehicle repairs your center performed, unless otherwise required by State law.
BMW Group’s AIR Application Resource for Flat Rate Labor Operation Codes
To obtain the corresponding flat rate unit (FRU) allowance information from the BMW Group AIR application
resource, start by entering the the Chassis Number (last seven (7) characters of the VIN), and click on the
“Search” icon. If the “Vehicle Selection” window displays two or more model possible vehicle choices, select
the applicable Model, or enter the full VIN (17 characters) instead to proceed. Click on the “Flat Rate Units”
button and enter a flat rate labor operation code number “without spaces” in the field to the right, click on the
“Search” icon to display the corresponding listing of “Flat rate unit group details” that are available and their
corresponding FRU allowances.
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
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52 12 25_CLICKING NOISE FROM SEAT BACKREST
Copyright ©2025 BMW of North America, Inc.
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