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What o2 extender works?

kaj

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Why not run a GESI catted downpipe?
I could look into it. I have a catted DP now that disappointed me. I'm sure I looked up the GESI part... Not sure why I decided against it. Maybe price....?
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M340i

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Hey what's up guys. I'm join this forum specifically for this issue. Came over from bimmerpost. Anyways, I just got my 2023 M340i last month. I'm still up in the air about the DP, but there is a dude that swears he can remove the code remotely. I'm aware the2023s are locked, but he said he could do it. Who wants to be the guinea pig? I'll post the links if there's interest here.
 

xektrum

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Gen 1 B58s have had great luck using this (including myself). For the price, it doesn't hurt to try and if it works on Gen 2 as well, the word can spread and people can enjoy their downpipes without a CEL :D
O2 Spacer That Works! (bimmerpost.com)
Just wanted to give feedback that these cheap AliExpress spacers do actually work. In not so hot weather some people (like me) run into the o2 sensor heating after catalytic circuit resistance too high code , I ended up troubleshooting it to be that, with the spacer, the sensor was taking too long to heat up to operating temperature thus triggering the computer into thinking the heating element was not working. Wrapping the sensor with aluminum wrap so that it would work as a heating conductor with the wall of the spacer made the trick, no more code and with a total cost under $10
 

armenh7

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Just wanted to give feedback that these cheap AliExpress spacers do actually work. In not so hot weather some people (like me) run into the o2 sensor heating after catalytic circuit resistance too high code , I ended up troubleshooting it to be that, with the spacer, the sensor was taking too long to heat up to operating temperature thus triggering the computer into thinking the heating element was not working. Wrapping the sensor with aluminum wrap so that it would work as a heating conductor with the wall of the spacer made the trick, no more code and with a total cost under $10
Oh wow, great discovery. Are you using the spacer I linked?
 

i3igpete

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Wrapping the sensor with aluminum wrap so that it would work as a heating conductor with the wall of the spacer made the trick, no more code and with a total cost under $10
A little more Clarity please, since the details matter. Did you use kitchen aluminum foil like Reynolds wrap? Or something like a spark plug boot protector?
 

Thraxbert

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FLtrackdays

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Any update on this?

Did anyone find anything that works well?
Thanks
It’ll work for a while. Until I took it to the track and drove pedal to the metal. After that I said oh well…. I‘m used to the cute little engine light now ?
 

cpunlamd

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Consensus is that these aftermarket spacers/mini cats do not work. The ArmyTrix and Kenji downpipes have a proprietary simulator that uses pin hole sized windows in their fouler using loose metal tweed inside the barrel of their fouler that works every time. IMO it’s worth their inflated pricing.
 

i3igpete

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FLtrackdays

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I have never found one that works on any make or model.
I just gave up trying to burn the next one out ? ?
 
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kaj

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kenji does sell a standalone defouler that contains precious metal shavings inside. Unlike the bigdaddy's spacer (which DOES work on modern g8x platforms until it melts), this one uses stainless housing and baffle which theoretically should solve that problem.

https://functionwerk.com/products/defouler-bung
If someone is willing to send me one, and it works, I'll gladly pay for it and give glowing reviews. I tried two "catalytic spacers" and lost money on both LOL
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