Both nox sensors are not working.
How do you know that? Which “both”? I think this car has four O2 sensors.
Your car doesn’t have nox sensors . . . however, it does have oxygen sensors, at least 3, probably even 4
And why are you so sure the sensors aren’t working?
And what is your definition of “not working” . . . ?
Knock sensor failure is not unheard of on this vehicle, I suspect you have faults P0325/P0330.
Replacement is not cheap, a little over $1000. Also there is the possibility of rodent damage to the wiring harness under the intake manifold near the knock sensors.