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There might very well be some oil additive, sealer/silicon exposed to the crankcase that has poisoned your O2 sensors again. Or knock off sensors.
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1988 325is (purchased new) sold
2004 X5 3.0 2005 X3 2.5
2008 X5 3.0 (new to me)
Last edited by 80stech; 09-01-2026 at 07:24 PM.
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