B720417

Acoustic and visual warnings indicate that the front passenger seat is occupied, and the safety belt is not fastened when the seat is actually unoccupied. If the situation is currently present, sit in the seat and move the seat to a slightl   What’s New (Specific text highlighted):

Models removed and put into new SI B72 01 22 (This bulletin will be released in the near

future)

Correction, Procedure, Parts, Claim sections have changed

MODEL

F90 (M5 Sedan) produced to July 31, 2018

SITUATION

Acoustic and visual warnings indicate that the front passenger seat is occupied, and the safety belt is not

fastened when the seat is actually unoccupied.

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. Advanced Crash Safety Module (ACSM) fault

“930A1C - Front passenger seat occupancy detection transmitting fault (moisture)” is stored.

CAUSE

Any or all of the following can contribute to this situation:

1. Electronics (e.g., smart phones or laptops) are connected to the USB charging port or cigarette

lighter and placed on the seat.

2. The seat was wet (e.g. very high humidity, wet clothing, spilled liquids, rain).

3. Insufficient shielding of the seat heater wiring.

4. Ground for the CIS seat mat is not secure.

CORRECTION

Consultation with the customer whether objects were possibly laid on the front passenger seat or the seat

was subjected to moisture (for example: from rain through an open window, wet clothes or towel or the

spilling of fluids on the seat cushion surface).

Perform a non-invasive check for moisture / stains on the seat and at the CIS evaluation electronics module

electrical connector.

Check the CIS seat mat ground.