Bmwr1d3h

I'm thinking of removing my secondary cats and the resonator but I'm worried for the check engine light to come on...anyone know if it will have an affect on the sensors...

thx...

hcetzneb

You o2s monitor the primary cats you can remove the seconary cats and resonators with out cel...hear are acouple of other options that would give better results... you could delete the primary cats this is what most tuners do because these are the most restritive and then all you do is have to relocate the rear o2 sensors behind the rear cats ..this tricks the (me) fuel ecu.. or you could delete all of them and have the me reflashed this will also lift all the speed limiters and give you acouple of extra ponies

BlackOnBlackCLK

no worries you wont get a check engine light

hooleyboy

You will not get a CEL.

da_guitarist

Nope! Try searching in the future. I've posted in the past couple of months about doing this and have had no issues. Multiple other people have verified as well. I have a video of this setup linked here also. Note, I'm referring to w208...should go for w209 also tho

KleanC

nope, ur good no CEL

Bmwr1d3h

Thx...i'll post video of whatever i decide to do...