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      11-09-2012, 01:04 PM   #4
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Drives: 2009 135i
Join Date: Mar 2012
Location: San Antonio, TX

Posts: 193
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I remember reading in the manual that 45k is for turbo motors and 100k is for non-turbo motors.

I changed mine at 53k and they looked disgusting.

If you have a tune, you should change them even sooner.

edit: found the pic i took. look at my 53k plug, notice how the gap has grown significantly vs. the new plug.
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Last edited by TheBurro; 11-09-2012 at 01:19 PM.
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