Hi guys, im about to replace all O2 sensors on my 06 5.4 king ranch but dealer i can get reasonably cheap bosch sensors has no clue about compatibility and Bosch online catalog is absolutely useless too...
Im wondering if anyone know what are O2 sensor bosch numbers for 04-08 and if up/down stream sensors are same....
To me 97-03 sensors look same as mine too, they available at dealer for $50ish each...

 

15664 is the Bosch # according to Napa's website. All 4 sensors are the same.