[bimmerinalong]

Calling all comms / electrical techs

Knowing that the networks these cars used for using BMW Assist have been discontinued, is a retrofit or modification possible to bring back just the SOS function?

When researching, most have asked for a complete retro fit to make ConnectedDrive, services, assist etc. work again.

I only want basic SOS emergency function to work. No need for other functions as SOS works without subscription.

Pressing the button attempts a call but the car cannot connect to a tower and starts flashing the antenna logo on screen.

If nesessary, here is relevant build sheet info

January 2007 build 335i with iDrive:

S609 - Navigation system professional
S620 - Voice control
S639 - Preparation F Mobile Phone Cpl. USA/CDN
S645 - BMW US Radio
S677 - HiFi System Professional DSP
S693 - Preparation BMW Satellite Radio
S694 - Provision BMW 6 CD changer
S6UH - Traffic info


It seems this has been done for the LCI models, since I won’t be needing any of the other features except SOS would possibly swapping the TCU that BMW offered on the LCIs and messing with coding be sufficient to get it to work?

Would like to retain as much of OEM as possible

Thanks