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      12-01-2021, 10:41 AM   #2
neilvan
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Drives: 09 E90 335i M-Sport 6MT RWD
Join Date: Nov 2017
Location: Ontario, Canada

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That would be the sheathing for the O2 sensor wires; No oil going through it.

Likely covered in oil due to a current or past leaking valve cover gasket
Appreciate 3