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Re: odor in ventilation system on 1997 E39 (archive)
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Posted by Jim Cash on May 23, 2000 at 07:49:01:

In Reply to: odor in ventilation system on 1997 E39 posted by rwong on May 21, 2000 at 19:21:11:

: I need help on my 1997 E39. It emits a odor that smells
: like sour milk after I turn on the air condition. It
: happens since car was new. The service adviser in the
: local dealer suggested spraying lysol disinfectant into
: the air intake under the hood with fan full blast and
: all air-vents open. This cures the problem for a few
: days and it keeps coming back.


Dealer is correct - and this should solve the problem - but you may need to be more thorough.

Remove the filters and spray them with lysol (actually you can wash them and it will not hurt them).

Then with the fan on "LOW' spray the lysol directly down into the open ducts - on both sides.

I do this about 4 times a year.

AND, once a year I pull the filter boxes and ducts completely out (they twist out) and hand clean inside the firewall and the fan blades (not easy to do).

Cheers
Jim Cash

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