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#1
02-17-2012, 10:07 AM
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O2 sensor replacement cycle
I am wondering if I should do preventive replacement or wait until my engine shows signs of needing one. Rich 2003 X5 3.0 140,000 
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#2
02-17-2012, 11:07 AM
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every 100,000 Kms.
__________________
--2004 E53 X5 4.8is - ECE version; right hand drive; Located in Hong Kong; ext. black sapphire metallic; int. leather black; adaptive dynamic bi-xenon headlights; 16:9 onboard monitor w/o navigation; 20" genuine BMW Y-spoke 214 wheels with Bridgestone Dueler H/P Sport tires; Int. rear view mirror w/ compass.
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#3
02-17-2012, 07:04 PM
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If they haven't thrown a code and you don't have any symptoms, I'd leave them in.
But if you want to replace them now, they're cheap -- $107 on Amazon for the two pre-cat sensors including tool. Search my posts for a link.
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Linear Mode
