The microswitches are very repairable. Either build up a knub or if I remember right I think I put a pin right through. I have not heard of both keys to stop working. Did the lock button inside the car still work?
Make sure you replace or at least check the air pump check valve or valves i guess with v8 when replacing the air pump.

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