i'd say find out which o2 sensor it is first but i didn't think it was too hard to do. just jack the car up high enough to get under there, be sure to use jack stands (
im sounding like my dad).
make sure u have enough light and it can actually be done if u have the right length wrenches and can get ur hands in there. but u can always get the correct o2 sensor socket from autozone for just a deposit.
bank 2 sensors are definately easier but the upstream sensor on bank 1 will be the hardest.
good luck
