4.6is O2 sensor
 

Hello guys I have to replace my post cat 02 sensor on my 03 4.6is

Im trying to figure out is bank 1 driver side or passenger??:dunno:

thanks guys:thumbup::thumbup:

Passenger

She been throwing codes at you? What's your impression so far?

How do you know its the o2 sensor? Have you scanned with DIS or a generic scanner? Many o2 sensor codes may also point to catalyst inefficiency, do you have any "marbles in a can" rattling from the exhaust at all?

:iagree: Post cat focuses on reading emissions. The cause is often upstream rather than the sensor itself.

^We are on the same page BC I've rarely seen an o2 sensor fail, but many o2 sensor codes thrown from other things.

don't you change the O2's every 100K in the M62's anyways?

Maintenance schedule for O2 sensors is 100,000 miles. The M62 engine schedule is the same as other models.