My Diagnostic codes tell me that these need replacing. I priced them at Schucks auto parts! O2 sensor-$130 and knock sensor-$250. Anyone found them cheaper somewhere else?

 

Goto www.courtesyparts.com

Call them up and tell them you are a member of maxima.org. You get an additional discount from their online prices. I think my o2 sensor was about $70-$75 shipped.

 

Read the Sticky 4th Gen Maxima Maintenance Items. The first post in that thread provides a list of dealers who sell genuine Nissan parts by mail order, at a discount.

I suggest you replace only the Oxygen Sensor. Sometimes that one repair will clear both codes.