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      02-04-2013, 04:13 PM   #5
Drives: 2009 135i
Join Date: Nov 2007
Location: Indianapolis

Posts: 827
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Originally Posted by Simon930 View Post
Why did you unplug the 02 sensors?

You should of just unscrewed them and left them hanging
A lot of the time it's a lot easier to unclip a weatherpack connector than to unscrew an O2 sensor. O2 sensor threads get dirty from exhaust particulates so they take some effort, it usually requires a big wrench (hard to fit an open ended 22-24mm wrench inside a packed engine bay, or even with an articulated wrench get the leverage), and you have to twist the wire many turns. To unclip a wire you often can do it with a finger nail or small flat blade screw driver then just pull.
2009 BMW 135i 6MT Sport, AFE intake, Cobb AP, Apex 18x8.5+9.5, 255/275 PSS

Last edited by Freon; 02-04-2013 at 04:26 PM.
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