Restraints - Seat Belt Motor Activates Unexpectedly

SI B72 01 09
Safety Belts and Accessories (Body)

March 2009
Technical Service

SUBJECT
Front Seat Belt Electric Motor Driven Reel Activates Unexpectedly

MODEL
F01, F02 (7 Series) produced up to 3/2009

SITUATION
The safety belts for the front seats have an electric motor-driven reel (EMA) which will retract/pretension the seat belt a specified amount when certain hazardous driving situations are present.

In driving situations where the vehicle is driven aggressively on windy roads or when negotiating tight turns, the EMA may activate prematurely, effectively taking the slack out of the safety belt.

This activation is premature, as no hazardous situations are present.
When this situation occurs, the EMA is not accompanied by the activation of other safety systems. No relevant fault codes are present.

CAUSE
Software in the EMA control unit

PROCEDURE
Do not replace any parts.

Program the vehicle using ISTA/P 2.33.1 or later. This version of ISTA/P is expected to be available from April 2009.

Note that ISTA/P will automatically reprogram and code all programmable control modules that do not have the latest software.

For information on programming and coding with ISTA/P, refer to CenterNet / Aftersales Portal / Service / Workshop Technology / Vehicle Programming.

WARRANTY INFORMATION
Covered under the terms of the BMW New Vehicle Limited Warranty or the Certified Pre-Owned program.





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