My driveway is a bit of a slope, and it's not uncommon for the pump to come on for a few seconds when I park on the hill and then shut the car off. I do not have original airbags in my car, so I know what it's like when they are leaky; I don't have any current leaks. It is normal for the airbags to level the car.

Also, when the vehicle is heavily loaded, or you hook up a trailer, it is normal for the pump to come on. I don't ever notice it coming on in normal driving. If the pump was bad, it would not adjust.

__________________
2014 BMW 328i Xdrive
2011 BMW 335i M-Sport
2008 BMW X5 4.8i Sport
2000 BMW 528i 5sp