Hopefully its a mundane coolant leak from a hose or something, and not a head/headgasket. Gotta figure out where the coolant is going.

I got this one. on 2017 cx9 pretty cheap, easy install, no extra fobs or apps or anything. just hit lock 3x.

Are you sure its a gas smell? And not a burnt coolant smell?

Personally I’d do just the torque converter. It’s a crapshoot even with new. Sometimes you’ll get a new thing and it goes to crap quickly. If you got a good one thats working fine, and is proven. I’d stick with it.

You could try some pledge, or anything that leaves a waxy residue. Will make it look a lot better.

I dont think there’s cylinder deactivation on these.