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Old 10-15-2012, 09:59 PM   #12979
Registered User
Join Date: Jan 2011
Location: San Diego
Posts: 2,928
My Ride: '12 135i Dinan S2
Originally Posted by ///MPR77 View Post
Nice, O2's are on my list of preventative maintenance.

Feel any improvement?

Sent from my SAMSUNG-SGH-I727 using Bimmer App
I can't decide if I can actually feel any improvement or if it's all psychological. I feel like my idle might be improved. I did not have a CEL for them, but old ones were very burnt and discolored after 130,000 miles.

I honestly felt more improvement after I cleaned my MAF. Even saw my OBC say 18.4 MPG instead of 18.3

Past: 1999 Techno Violet Metallic M3
Present: 2012 135i DCT Dinan S2
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