What's the 2001 honda crv o2 sensor location?

The oxygen sensor on the 2001 Honda CR-V is typically going to be located on the passenger side of the vehicle, mounted onto the exhaust pipe pretty close to the catalytic converter. You can access it through the grommet, but it'll be a bit tight; find someone with smaller hands to help out, if You can. Replacement costs for this part brand new tend to run around $70 from a chain like AutoZone; You don't need to use any specific brand, and most of the off-the-shelf ones You'll buy are going to last You as long (or, longer, since You're replacing it!) the OEM one.