What's the actual code? Mine had a secondary pump code. I knew it was failing because I could hear the bearings making noise. Two replacement pumps set the same pump code. A third replacement pump worked. The two lower priced air pumps didn't work. A Hella pump from RockAuto worked. RockAuto let me return the two other brands. Jumping the pump with 12V has full battery amps. Replacement pumps probably have higher motor start resistance. The higher resistance probably sets the codes. Try a Hella air pump. It worked on mine

__________________
'06 X5 3.0i - bought @143,123 miles (12/26/20)