Driver's side means specifically to do with the steering wheel airbag or driver's seat as the driver could be on either side.

And yes, I just check the wiring diagram and crash sensors are referred to as left and right, the active components driver and passenger.

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1988 325is (purchased new) sold
2004 X5 3.0 2005 X3 2.5
2008 X5 3.0 (new to me)