2002 Highlander 4 cyl O2 sensor location.?

its probably connected into the catalytic converter. Look under your car and look at the exhaust system. The cat is probably in the middle of it and there is going to be maybe 2 probes into it. I cant tell you which one it is tho

6 Cyl is a lot greater suitable appropriate than a 4 cyl. greater suitable torque. the 4.0 skill the displacement of engine in liters. between the suitable engines ever used in a Jeep indoors the 4.0 L in-line OHV 6 cyl, at circumstances user-friendly by way of way of actuality the 4.0 HO. the present 6 cyl used in new jeeps is the Chrysler based 3.7 or 4.0 V6. whilst those are as helpful by way of way of actuality the previous in-line 6 they don't seem as torquey at low engine speeds and as a result do not pull as appropriate indoors the off-highway circumstances Jeeps are user-friendly for.