Thread: Down stream Oxygen Sensor Failure twice S55
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      04-06-2023, 06:38 PM   #6
Bimmer_nerd
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Drives: M2
Join Date: Jul 2019
Location: CA

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No race gas, just ACN91 and occasionally e85

I believe anti seize is used when they installed the sensor, I'll have my shop verify and get back with the confirmation.

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