I have never replaced the O2 sensors, but I believe the cables on them are not very long. THere is a quick-disconnect plug in line, you've got to get the cable out of the protective sleeve I mentioned above to get to it.

ALSO, be very careful about what sensor you order. You want the "direct replacement" ones, some come with the cable, but not connector and you must then change the connector housings yourself. NOT a fun job at all.

Order the "exact fit" Bosch sensors. But don't change the sensors unless you KNOW that is the issue. Bad plugs or plug wires will cause the cylinders to miss, putting high levels of O2 in the exhast, causing O2 codes. This happened to me around 100,000 miles. 12 plugs and wires solved it.