Thanks a bunch. Yes I’m pretty certain I have to pull off heat shielding. Trying to see if I can do it without dropping the prop shaft!!

I will see if I can get the proper TIS on eBay. Thanks for that tip.

I’m in the US and yes it has SCR. Here are the sensors IMG_6895.jpeg You can see that these things have mounting holes and output connectors as well. I’m trying to find where those modules mount as I know there are heat shields that have to be removed at minimum. Thes NOx sensors are before and aft ...

I’m pretty sure that’s not correct because there are modules on the ends of the cables that mount to the body somewhere. The cables are slightly shorter than 3’ each, not long enough to get to the engine compartment.

I can see the two sensors ahead of and behind the cat, not hard to get to. But each has a really long cable to a squarish control/electronics module that are completely hidden. No idea where they are and how much work it will be to get to them. Anyone replaced these before? Trying to avoid a MASSIVE ...