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Old 12-02-2012, 05:00 AM   #6
Registered User
Join Date: Nov 2009
Location: Fairfax, VA USA
Posts: 19,462
My Ride: 330CiC, M5, X5
You likely have moisture getting in the car somewhere.

Check the floor carpet for dampness.

Search sunroof drain (assuming you have a sunroof) and door vapor barrier.

If you have a 4 door car it is HIGHLY likely your rear door vapor barrier(s) is(are) leaking. The rear door vapor barriers AUTOMATICALLY leak after 6-7 years.

The front door vapor barriers can leak, but not as often.

Also if you have had any work inside the doors, this is a likely place to check for leaks as well.
Solve your misfires, lean codes, rough idle -

Fuel pump failures -

Temp Info -

Hidden OBC Menu - Check Voltage, Temp, Fuel Level -

E46/E39 GM5 Door Lock Info -

Lower hose temp switch O-ring - BMW #13621743299
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