12/1/22, 9:39 AM

65 20 22_KNEE AIR BAG CHECK CONTROL MESSAGE

SIB 65 20 22
KNEE AIR BAG CHECK CONTROL MESSAGE

2022-11-30

MODEL
E-Series
G20
G22
G23
G26
G42
G80
G82
G83

Model Description
3 Series Sedan
4 Series Coupe
4 Series Convertible
4 Series Coupe
2 Series Coupe
M3
M4
M4 Competition

Production Date

Affected Option Code

From Start of Production
to October 26, 2021

All US vehicles are equipped
with Knee Air Bags as
standard equipment

SITUATION
A check control message for the restraint system appears. In the instrument cluster, the red air bag warning
light lights up permanently.
One of the following fault codes is stored in the ACSM (air bag control unit):
930949 - Knee airbag, driver: short circuit to negative terminal
93094F - Knee airbag, front passenger: short circuit to negative terminal
93094C - Knee airbag driver's side: Resistance too great
930952 - Knee airbag, front passenger: Resistance too great

CAUSE
The wiring harness going to the knee air bag(s) may be rubbing against the support tube of the instrument
panel.

CORRECTION
Remove the center console to access the ACSM control module.
Remove the knee air bags on both sides of the vehicle.
This gives sufficient access to perform this repair.
The dashboard cover does not need to be removed.
The knee air bag harnesses end connectors are cut off and the wiring taped back to the harness.
Run the new air bag repair wiring harnesses from the ACSM control module to both knee air bags.
The replacement harnesses do not need to follow the same exact routing path as the original.
Both replacement harnesses are to be installed, even if there is only a fault showing for one side.

PROCEDURE
1- Perform a vehicle test with ISTA.
2- Remove the center console as per Repair
Instructions 51 16 165 to access the Air Bag
Control Module A11 (ACSM) wiring connector
(A11*2B).

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Check the ACSM module for signs of corrosion
within the electrical connectors.

3- Follow Repair Instructions 72 12 004 to remove the driver’s knee air bag.
Unplug the connector (
B8*1B) on the knee air bag on the driver's side
Cut the knee air bag wiring harness near the connector and tie back the cut wiring with a cable strap
4- Follow Repair Instructions 72 12 006 to remove the passenger’s knee air bag.
Unplug the connector (
B77*1B) on the knee air bag on the passenger’s side
Cut the knee air bag wiring harness near the connector and tie back the cut wiring with a cable strap
The repair wiring will be run together with the additional harness protection addressed in
the next steps
5- Apply felt tape to the location pictured on the
passenger side.
Glue the felt generously onto the support tube or to the
corresponding edge.
(Felt tape part number 54 34 7 248 700).

Important: The felt must be glued around the
edge!

6- Apply felt tape to the location pictured on the
passenger side.
The top area is behind the dashboard cover but can be
accessed once the passenger knee air bag has been
removed. The lower area is the same pictured above.

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Glue the felt generously onto the support tube or to the
corresponding edge.
(Felt tape part number 54 34 7 248 700).

Important: The felt must be glued around the
edge!

7- The driver knee air bag wiring should be
protected from chafing at the dash support
bracket.
Glue the felt generously onto the support tube or to the
corresponding edge.
(Felt tape part number 54 34 7 248 700).

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Important: The felt must be glued around the
edge!

8- Install felt tape in any other potential chafe location.
Unplug the wiring connector from the ACSM (A11*2B).
Reference Wiring Diagram ‘Airbag firing circuits’ SP0000063664 and
confirm the wire color and pin number BEFORE cutting these 4 wires at the ACSM connector.
9- Cut the 4 wires for the knee air bag wiring harnesses near the ACSM connector and tie back the 4 cut
wires with a cable strap.
ACSM Pin 25 (
ACSM Pin 20 (
ACSM Pin 5 (
ACSM Pin 10 (

A11*2B) goes to pin 1 of driver knee air bag (
A11*2B) goes to pin 2 of driver knee air bag (
A11*2B) goes to pin 1 of passenger knee air bag (
A11*2B) goes to pin 2 of passenger knee air bag (

B8*1B).
B8*1B).
B77*1B).
B77*1B).

Then pin 2 repair cables into the airbag control unit connector (A11*2B).
Wrap the knee wiring harnesses with an abrasion-resistant fabric tape (part number 61 13 6 925 452).
Route one repair harness to the knee airbag on the driver's side and the other to the knee air bag on the
passenger’s side. The replacement harness does not need to follow the same exact path as the original.

PARTS INFORMATION
When applicable, 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
61 11 5 A7B 939
AND
61 11 5 A7B 940
AND
61 13 6 925 452

Description
Passenger side knee air bag repair harness
Drivers side knee air bag repair harness
Fabric adhesive tape abrasion resistant (25 mm)

Quantity
1
1
As needed

Bulk Materials - Sublet

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54 34 7 248 700

65 20 22_KNEE AIR BAG CHECK CONTROL MESSAGE

Felt strip, self-adhesive (130x40x3 mm)

Sublet as needed

CLAIM INFORMATION
Covered under the terms of the BMW New Vehicle Limited Warranty for Passenger Cars and Light Trucks.
Defect Code:

6112900300

G2x G4x G8x Check Control message, restraint system
(wiring harness, knee airbag)

Refer to AIR for the corresponding flat rate unit (FRU) allowance.
Labor Operation

Description

Labor
Allowance

00 00 006

Performing vehicle test (with vehicle diagnosis system – checking
faults) (Main work)

Refer to AIR

Performing vehicle test (with vehicle diagnosis system – checking
faults) (Plus work)

Refer to AIR

Support voltage of the vehicle electrical system / recharge vehicle
electrical system battery

Refer to AIR

Or:
00 00 556
And:
61 21 528

If you are using a Main labor code for another repair, use the Plus code labor operation 00 00 556 instead of
00 00 006, or exclude (including 61 21 528) when the Vehicle Test is included in another repair.
And, as necessary:
Labor Operation
61 00 006*
Or
00 58 500*
And:

Description
Performing vehicle diagnosis – test module

Labor Allowance
Work time (WT)

Diagnosis Worktime Flat Rate (See below)

2 FRU

Removing and installing/replacing airbag module for driver's knee
protection

Refer to AIR

72 12 506

Removing and installing/replacing airbag module for passenger
knee protection

Refer to AIR

And:
51 16 665
And:

Completely removing and installing center console

Refer to AIR

00 72 587

Install repair cable of left or right knee airbag (Associated work,
after vehicle diagnosis) (center console removed)

4 FRU

Install repair cable of left or right knee airbag for the other side
(Associated work, after vehicle diagnosis) (center console
removed)

4 FRU

72 12 504
And:

And:
00 72 587

Work time labor operation codes 61 00 006 and 00 58 500 are not considered a Main labor operations.

*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.
And, as needed:
Sublet – Bulk Materials (RO and Claim Comments Required)

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65 20 22_KNEE AIR BAG CHECK CONTROL MESSAGE

Sublet Code Up to $5.00
4

Reimbursement for the repair-related bulk material (Do not use the
BMW part number for claim submission)

Sublet reimbursement calculation for claiming the applicable repair-related bulk material (BMW part number)
is at the dealer net price amount for the quantity used plus your center’s handling.
Enter this material cost in sublet and itemize the amount on the repair order and in claim comment section.

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feedback in the rating box at the top of this bulletin
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ticket to the Warranty Department, or use the chat available in the Warranty
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ticket to the Parts Department

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