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Home >> BMW >> 2011 >> 335i 2D Convertible, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 42 (Airbag, Audio, Navigation And Anti-Theft - Repair - E90) >> Airbag Control Units, Airbag Sensors >> 65 77 600 Replacing sensor mat for front passenger seat occupancy detector

65 77 600 Replacing sensor mat for front passenger seat occupancy detector

WARNING: This page is about a different variant/trim than selected.
WARNING: Note AIRBAG SAFETY REGULATIONS !
Incorrect handling can activate airbag and cause injury.
WARNING: US/CDN front passenger seat (with OC3 mat) only:
A defective OC3 mat may only be replaced complete with the upholstery and the seat cover.
New OC3 mat is supplied with upholstery, seat cover and if necessary seat heating.
After fitting, the OC3 mat must be enabled with the diagnosis system.
Separate components not available.

Release seat occupancy detection: 

Necessary preliminary tasks 

Disconnect plug connection (1).

IMPORTANT: To prevent the seat occupancy detector electronics box from slipping, do not pull too strongly on the cable.
Fig 1: Identifying Plug Connection
G04753741Courtesy of BMW OF NORTH AMERICA, INC.

Cut front bonding surface (4) in area on sensor mat (1) with cutter knife or heavy-duty scalpel from foam without damaging the foam and the sensor mat.

If necessary, also cut away deviating sticking points from seat cushion without incurring damage.

Remove sensor mat (1) and feed out electric line.

Installation note: 

Observe assembly sequence:

Fig 2: Identifying Front Bonding Surface And Sensor Mat
G04753742Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: In order to guarantee the function and fastening (adhesive strength) at the bonding surfaces of sensor mat (1), the foam must not show any traces of damage.
Replace the foam if it is hardened or damaged particularly in the area of the bonding surfaces.
To prevent the electronics box (2) from slipping, do not pull cable too strongly through hole penetration (5).