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Old 10-31-2012, 07:57 PM   #5
Goodtohave
2nd Gear Member
 
Join Date: Feb 2011
Location: Canada
Posts: 80
If you want to check the O2 sensor just unplug it from the other end under the hood.

Easy to do...I drove my M50 525 for over a year with the O2 sensor unplugged.
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