Hi David.X5

Is this the component you are referring to



New Steering Ignition Switch Starter Fit BMW E39 540 E38 750 E53 x5 61326901962 | eBay

The PN for the above image is 61326901962 and is about $20

I too experience this no-start anomoly sometimes. It resolves itself with another cycle of the key to start.

Another question, does this module work for every key? Any install tips appreciated.

Thanks,

Mike

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Mike
Dallas, TX & Appleton, WI
2003 E53 4.4i Pearl Beige
2003 E46 330Xi Monaco Blue
2007 E90 335Xi Black Sapphire Metallic
2011 F25 X3 28i Black Sapphire Metallic