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      12-07-2020, 09:41 AM   #3
overcoil
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Drives: M235i 6spd
Join Date: Dec 2013
Location: Mid-Atlantic

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I think ( I did read ) that if you were detailing the engine bay with the car running and spraying silicone based spray to rejuvenate or spraying some exterior spray waxes with silicone with a running engine - that silicone can mess up lambda sensor or mass air flow sensors.
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