air vacuum pump license plate
 

Hello guys,
don't know if any the simptoms my car is having are related, but here's what's going on:

1.- Turn on the ignition, you hear something like a pocket size vacuum would sound, it does this for about 2 minutes then goes away, i think I hear it on the secondary air pump, and, I swear I didn't hear this before, or at least not for that long of a period.

2.- Self Level suspension inactive. replaced module (some of the pins were corroded), still get the message

3.- my license plate lights started going out, I would replace them, and in time, just go out. and I noticed something today, while the car was on, one of the lights, flickers, and the other one is out.

OMG, is it time for a trade-in? I don't really wanna....

2000
4.4i
148,000 miles

If the self level suspension control module had corroded pins it had to get a little wet somehow. The black plastic bin the battery and module are in has a foam seal around the perimeter where it bolts down to the body that gets flattened out after so many years and can let water in if you're driving through a decent rain, especially on the highway. You can probably just unbolt in, prop it up an inch and run a small bead of rtv under the lip to seal it when you bolt it back down. (if this is the case at least)

And the module won't work properly plug and play, would have to be coded and activated/calibrated etc. by either the dealer or a properly equipped indy that knows how to do it.

For the license plate lights, the seal around the grip strip can leak after the years as well and cause corrosion/resistance at the lights. You can see it not so clearly marked in this link.

RealOEM.com * BMW E53 X5 4.4i TRUNK LID/REAR WINDOW