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I replaced the downstream O2 sensor and the CEL returned with the same code unfortunately. Not sure what my next step will be here. Either contact AA and exchange or maybe just add an extender?

Company makes claim about product, company charges high price for product, product does not meet claim made by company, people get upset. I don't think we are off basis, it's pretty simple.

The code isn't related to Cat efficiency, it makes sense that with the added heat coming through the downpipe that the downstream sensor would marginally degrade. I think it's dependent how new the sensor is which would explain why some people don't have the issue.

Where did you purchase the sensor from? It's 280~ from dealer but I see overstock sites listing for low 200s. Want to make sure I'm actually getting the OEM part.

Ok I'll plan on just buying that then thank you, if the cel pops up again please let me know tho haha knock on wood

The rears are 19x10.5 +32 and I'm running H&R lowering springs which only drops it .75 inch in the rear. Looking for as flush as possible without any rubbing. I've heard conflicting reports on whether to go 305/35 or 305/30 or 295? I was just looking at Michelin PSS but open to any other...

Got it. How long ago did you replace the sensor, just curious

I'm fairly certain my 2020 is a Gen 2, B58TU (B58B30C). Will that sensor you linked work for me? Also do you know the reason as to why this even happens lol?

UPDATE: I purchased the downstream O2 sensor recommended and the CEL returned two days later with the same code I installed the Active Autowerke catted downpipe and tuned with MHD. I selected 'aftermarket dp' in the MHD configurations and followed the break in procedure provided by AA. After a...