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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Mechanical Maintenance: Break-in / Oil & Fluids / Servicing / Warranty > O2 sensors dying



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      09-30-2011, 06:14 PM   #1
Tassno
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O2 sensors dying

I have a 335xi and I have lost 3 o2 sensors in the past 6 months. I have 80k miles on my car. Does this seem insane? My service tech thinks it could be a result of carbon build up from the fuel injector. Anyone with similar problems that can shed some light. Thanks.
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      10-01-2011, 02:15 AM   #2
queensfield
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Funny thing- I just heard a friend describing this to me at the grocery store. In his case, it was the catalytic converter that died. He also has the 2008 335xi (at about 125K miles). I was told the codes for O2 sensor and catalytic converter can be inter-related and confusing.
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