Seat Occupant Sensor: Service and Repair

65 77 604 Replacing Sensor Mat (CIS Mat) For Front Passenger Seat Occupancy Detection







WARNING:
Note airbag safety regulations.
Incorrect handling lead to airbag deployment and cause injury.







WARNING:
Only US and Canadian version of front passenger seat (with CIS mat):
The CIS mat can only be removed from the upholstery together with the seat cover.
If CIS mat, seat cover or seat heating is defective, all parts may only be replaced together.
After fitting the seat cover, the CIS mat must be enabled with the BMW programming system.







Procedure for replacing the CIS mat together with the seat cover is described in:
- Replacing seat cover for front seat

Cable routing, earth cable CIS:







Overview of cable routing for CIS mat:
1. Data line CIS
2. Earth cable, seat pan
3. Earth cable, backrest frame







Bolting point (1) on seat pan.
Earth cable (2) from seat pan.







Bolting point (1) for earth cable on backrest frame.







Enabling seat occupancy detection (CIS mat):
- Connect BMW programming system
- Code airbag control unit
- Delete fault memory if necessary