[Moon19]

Hi. I have a 2010 Explorer xlt 6cyl 4.0 l it’s the code p0053. I need to know the Bank 1 sensor 1 location? Pictures would help a lot. Also if I can get to it from the top or bottom. Thanks

 

[MikeHTally]

Probably the O2 sensor upstream of the Cat, driver's side. From underneath, most likely.