How about changing the Camshaft Position Sensor???

Have not dealt with this issue with the X5 but have seen this appear on some e39 M5's and performance is affected by this problem. Change it and see how it works.

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TQ2K


'04 N62 - Alpine White/Truffle
'03 S62 - Petrol Mica/Champagne
'97 S52/4/5 - Alpine White/Dove
'91 M42/4/5 - Brilliantrot/Tan