Replacing sensor mat (CIS mat) for front passenger seat occupancy detector (M4 Convertible)

Incorrect handling can activate airbag and cause injury.

The CIS mat is bonded to the entire surface of the facing and can only be removed in conjunction with the padding from the seat cover.

If CIS mat or padding is defective, both parts may only be replaced together.

Full functional capability can only be guaranteed with original BMW spare parts.

After installation, the CIS mat must be enabled with the BMW PROGRAMMING SYSTEM .

Procedure for replacing the CIS mat together with the upholstery is described in:] 

• Remove PADDING FOR FRONT SEAT .

The work scope with CIS mat is different for the following work steps:

Loosen the bolting point (1) of the ground cable on the seat pan.

Courtesy of BMW OF NORTH AMERICA, INC.

Cut open cable strap (1).

Lift locking tab and pull the connector out of the side of the connector housing.

Installation note: 

Replace cable tie (1).

Connector is encoded against incorrect assembly.

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note: 

Enabling seat occupancy detector (CIS mat): 

• Connect BMW programming system
• Encode AIRBAG CONTROL UNIT .
• Delete fault memory if necessary