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      05-03-2010, 01:11 PM   #9
tom @ eas
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Drives: BMW
Join Date: Nov 2005
Location: Anaheim, CA

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My guess is that the CEL deleter simply firewalls the light from appearing on the dash, which would be preferable in order to keep systems in check during the tuning process. This way it can be removed without any permanent effects on the M3.

For those local and are looking to turn off the rear O2s, we can do this with coding in-house - whether you're equipped with a tune or still on stock programming.