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      01-26-2018, 05:17 PM   #1
FTL_1
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Local Coder for O2 sensor delete - N54 135i

Hello BMW world,

I am looking for someone who can code out my post cat O2 sensors, the vehicle is a 2009 135i with the N54 engine. I have some catless downpipes I want to install and don't want to constantly have the err code bugging me.

Anybody who knows some good or if anybody has suggestions please let me know!

Thanks,

AJS
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      02-01-2018, 02:13 PM   #2
asiflicious
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Quote:
Originally Posted by FTL_1 View Post
Hello BMW world,

I am looking for someone who can code out my post cat O2 sensors, the vehicle is a 2009 135i with the N54 engine. I have some catless downpipes I want to install and don't want to constantly have the err code bugging me.

Anybody who knows some good or if anybody has suggestions please let me know!

Thanks,

AJS
I'm assuming you're going to be running a tune with your downpipes? If so, you don't need a coder
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      02-02-2018, 01:55 PM   #3
04mazdaspeed
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If you run mhd, you wont have any codes for the rear o2's. Wont pass emissions but that can be fixed.
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2011 135i DCT, 33k miles FBO on custom e30 tune
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      02-07-2018, 03:41 PM   #4
FTL_1
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Thanks for the replies! I threw the DP's on this last weekend after I did a turbo replacement (worst 30 hours of my life, I forgot to put on the o-ring for the oil-feed line from the block tot he turbos and puked out a quart of oil on my buddy's driveway). I bought the car with a DINAN stage 2 tune on it and plan on moving to cobb accessport V3 eventually, but was curious if this was going to throw a code or not.

Tonight I am going to drive around more in the car to see if a code gets thrown, and then I'll know! I think eventually I am going to buy a DP fix (RC filter circuit to trick the DME) and then splice it into the O2 connectors under the tranny for a more OEM look if the codes get thrown.

I've got an N54 and the midpipes have cats on them as well but WA state removed the sniffer test and instead just plug into your ODBII to look for the 'ready' state. Bastards.
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