NHTSA ID Number: 11028928
Manufacturer Communication Number: B720125
TSB/Document Date: 2026-02-23
Summary
A situation may occur where the front passenger seat is not occupied; however, a “fasten seat belt” warning and a front passenger seat air bag deactivation message appears. If the situation is currently present, sit in the seat and move the seat to a slightly different position. The POL (Passenger Occupancy Light) light should now function correctly. In some cases, the Air bag Warning Light was illuminated, and the following Advanced Crash Safety Module (ACSM) fault is stored: 930A1C - Front passenger seat occupancy detection transmitting fault (moisture)
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TSB/Document ID: B720125
Replacement Service Bulletin Number:
MFR Communication Date: 2026-02-11
MFR Internal Campaign ID/Software Version: 6577900600
Communication Type: Warranty Program/Extension
NHTSA Components: SEATS
MFR Component System:
MFR Component Subsystem:
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October 2025
PROCEDURE – CONTINUED FROM SI B72 01 25
Note: Before performing this seat heating wiring repair kit retrofit/installation procedure and
submitting a claim, first confirm that the vehicle has one of the above coverage notices in the
Warranty Vehicle Inquiry’s (WVI) Vehicle Comments section.
Also review the Repair History (Claims) section below in the WVI to confirm that a prior claim for
this wiring repair kit retrofit/installation procedure has not already been submitted and accepted.
This would include Repair Code 52 10 90 01 00 claim submissions.
If you have ELW eligibility and/or coverage questions, please contact the Warranty department through IDS
by selecting Coverage, Policy, Coding Questions and Mileage Corrections prior to performing any repair.
Use AIR to identity the vehicle’s installed seat option, and to determine if there are also any optional seat
accessories installed, this information is required other steps later in the procedure.
AIR’s Optional Equipment Listings
Applicable Option Codes
G11
0456 Comfort seat with memory
G11
0456 Comfort seat with memory
G12
G12
Base – Standard Seat/No Code
0456 Comfort seat with memory
G12
0456 Comfort seat with memory
G12
0456 Comfort seat with memory
G30
G32
G30
G32
G30
G32
0453 Climate-controlled seats,
front
04T7 Massage function,
driver / fr. passenger
04T7 Massage function,
driver / fr. Passenger
0453 Climate-controlled seats,
front
0453 Climate-controlled seats,
front
04T7 Massage function,
driver / fr. passenger
481 – Sports seat
0456 Comfort seat with memory
0456 Comfort seat with memory
0453 Climate-controlled seats,
front
CONFIDENTIAL
1
Attachment 1 to SI B72 01 25
October 2025
The “Find” function (CTRL – F) can be used in AIR to locate the option codes.
1. Verify with the customer that no objects were lying on the seat that could have caused the warnings.
Note: Electronic devices that are placed on the front passenger seat, e.g., laptop computers, mobile
phones, etc., could cause the front passenger airbag warning lamp to activate.
This behavior occurs primarily with devices that are connected to the vehicle electrical system via a
USB cable or other charger adapter.
In vehicles with an acoustic safety belt warning, this could cause the warning signal to sound.
2. Moisture on the seat surface can also cause a faulty seat occupancy detection. In this case ACSM fault
930A1C will be stored.
•
Perform a non-invasive check for signs of moisture.
a. If moisture is found, dry the mat and clear the fault. Moisture caused by outside influence is a
non-warranty issue.
b. If no moisture is found, proceed to the next steps
3. Prior to replacing components, inspect the connection of the CIS mat ground wire to the structure at the
lower right side of the backrest (circled).
The eyelet on the ground wire should make solid
connection to the structure with no free play.
If free play is identified, repair as needed.
CONFIDENTIAL
2
Attachment 1 to SI B72 01 25
October 2025
Secure ground screw to eliminate free play to the
structure.
Torque specification: 4.5 Nm (+/-0.5)
4. If steps 1 to 3 did not identify those items as the cause of the false right front seat occupied notice,
access the bottom seat cushion per Repair Instructions so that the installed:
•
•
Front passenger’s seat heating / CIS mat part number, and its
Change Index number can be determined.
To access the label’s information, loosen seat mounting, open the central connector, fold seat to the back,
completely.
CONFIDENTIAL
3
Attachment 1 to SI B72 01 25
October 2025
In this example, the BMW Part Number 2 654
847 is shown (circled).
The corresponding KDN (Revision) Index
number “AI01” is shown (circled).
5. Seat CIS Mat Check One (1)
Obtain the vehicle’s passenger seat heater/CIS mat part number and its KDN (Revision) index “AI” number
that is currently installed in the vehicle.
Vehicle Seat Option and Seat Accessory Configurations / Install Seat CIS Mat Wiring Repair Kit
Matrix
G11
0456 Comfort seat
w/memory
G11
0456 Comfort seat
w/memory
Series Seat Options
G11
G11
G11
G11
G11
G11
G12
G12
0453 Climate-controlled seats,
front
Seat Option Codes
Comfort Seat w/Memory
SA 456 + 4T7
+ Massage
Comfort Seat w/Memory
SA 456 + 4T7
+ Massage
Comfort Seat w/Memory
SA 456 + 4T7
+ Massage
Comfort Seat w/Memory +
SA 456 + 453 + 4T7
Ventilation + Massage
Comfort Seat w/Memory +
SA 456 + 453 + 4T7
Ventilation + Massage
Comfort Seat w/Memory +
SA 456 + 453 + 4T7
Ventilation + Massage
Base – Standard Seat
0456 Comfort seat with
memory
No Option Code Number
CONFIDENTIAL
4
04T7 Massage function, driver /
fr.
passenger
04T7 Massage function, driver /
fr.
Passenger
Part
Number
Change Index (less than
<)
7 739 629
AI10
7 354 594
AI07
7 478176
AI07
7 357 629
AI10
7 354 595
AI09
7 748 178
AI09
Attachment 1 to SI B72 01 25
G12
G12
0456 Comfort seat with
memory
0456 Comfort seat with
memory
Series Seat Options
G12
G12
G12
G12
G12
G12
G12
G12
G12
G12
G12
G30 /
G32
G30 /
G32
G30 /
G32
0453 Climate-controlled seats,
front
0453 Climate-controlled seats,
front
Seat Option Codes
Part
Number
No Option Code Number 7 354 590
No Option Code Number 7 478 172
SA 456
7357416
SA 456
7354596
SA 456
7478179
Base – Standard Seat
Base – Standard Seat
Comfort Seat w/Memory
Comfort Seat w/Memory
Comfort Seat w/Memory
Comfort Seat w/Memory +
SA 456 + 453
Ventilation
Comfort Seat w/Memory +
SA 456 + 453
Ventilation
Comfort Seat w/Memory +
SA 456 + 453
Ventilation
Comfort Seat w/Memory +
SA 456 + 453 + 4T7
Ventilation + Massage
Comfort Seat w/Memory +
SA 456 + 453 + 4T7
Ventilation + Massage
Comfort Seat w/Memory +
SA 456 + 453 + 4T7
Ventilation + Massage
04T7 Massage function, driver /
fr.
Passenger
Change Index (less than
<)
AI06
AI07
AI06
AI04
AI06
7 357 629
AI10
7 354 595
AI09
7 748 178
AI09
7 357 629
AI10
7 354 595
AI09
7 748 178
AI09
0481 Sports seat
0456 Comfort seat
w/memory
0456 Comfort seat
w/memory
Series Seat Options
G30 /
G32
G30 /
G32
G30 /
G32
G30 /
G32
G30 /
G32
October 2025
0453 Climate-controlled seats,
front
Seat Option Codes
Part
Number
Change Index (less than
<)
Sport Seat
SA 481
7450449
AI04
Sport Seat
SA 481
7387697
AI07
Sport Seat
SA 481
7478180
AI05
Sport Seat
SA 481
7387761
AI02
Sport Seat
SA 481
7387708
AI04
CONFIDENTIAL
5
Attachment 1 to SI B72 01 25
G30 /
G32
G30 /
G32
G30 /
G32
G30 /
G32
G30 /
G32
G30 /
G32
G30 /
G32
•
October 2025
Sport Seat
SA 481
7478181
AI04
Comfort Seat w/Memory
SA 456
7379629
AI10
Comfort Seat w/Memory
SA 456
7354592
AI08
Comfort Seat w/Memory
SA 456
7478175
AI09
SA 456 + 453
7379629
AI10
SA 456 + 453
7354593
AI10
SA 456 + 453
7478177
AI11
Comfort Seat w/Memory +
Ventilation
Comfort Seat w/Memory +
Ventilation
Comfort Seat w/Memory +
Ventilation
If the Change Index number is lower / less than (<) what is specified in the table above for the
matching vehicle seat option(s) and part number, then:
A.
Install the wiring repair kit for the front passenger seat heating/CIS mat.
•
If the Change Index number is equal to (=), or greater than (>) what is specified in the table above
for the matching vehicle seat option(s) and part number, then:
B.
Proceed to the next and final check (Step 6).
•
If the seat mat part number is not listed in the attachment Matrix, then do not install the repair
harness.
6. CIS Mat Check Two (2) for all the Seat Configurations above
•
52 10
52 10
52 10
C. Install the wiring repair kit for the front passenger seat heating/CIS mat sensor.
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