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Old 01-16-2013, 12:46 PM
necero necero is offline
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Location: Chicago, IL
Join Date: Jan 2013
Posts: 14
Mein Auto: 2000 BMW 540i
Originally Posted by edjack View Post
How many miles on the pre-cat O2 sensors? If original, you're overdue for replacements.

You could also take it to a shop for a smoke test.
I assume they are the originals, but am not positive. I have all of the service history so I could go digging and find out.
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