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Mend Sigma M Series Not Unlock Doors

My Sigma M Series does not unlock the doors?

My Sigma M Series Alarm system arms and locks the doors OK and disatms the system but does not unlock the doors, which I have to do manually. The system is fitted to a BMW 318i and is 9 years old.

Fred Crooks
February 2009
SigmaSigma M SeriesSecurity Systems, Car Alarm SystemsM Not Unlock Doors

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Sigma M Series Door Unlock Issue - BMW 318i