Question about 2005 BMW X5
This is quite a common problem. As well as cooling the air, the air con system removes moisture from it. When you switch off, the moisture has a tendency to collect within the system and the resulting damp environment is perfect for bacteria to grow in (which causes the smell.)
A simple service of the AC system by a specialist will almost certainly cure the problem.
Alternatively, there are some DIY products available (Check your local car spares store). I have used one in the past which consisted of an aerosol spray that you released inside the vehicle and then left the AC running for a while. The result were ok, but not as good as a proper service.
Hope this helps!
Posted on Jun 26, 2009
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Posted on Jan 02, 2017
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