Oxygen Sensors

[glucas01]

I have a 1997 LeSabre and it coded telling me I need to change the O2 sensors . Money is tight and I know they both should be changed . I was wondering if one of them is more likely to go before the other one . I would change that one first , then the other at a later time .
Any input would be greatly appreciated
Thanks
Gerry Lucas

[tman]

I had no idea there were two O2 sensors...

[Jed Rule]

The Northstars have 4. One in each exhaust manifold, and one in front and in back of the cat.
(At $100 each).

[Lasota]

Check with your parts store and see if the same type is used front and back. If they are the same, buy one. Flip a coin and change one, keeping the old one, if the code is gone you got lucky if not take the old one and replace the one you did not change.

[buickmastermind]

You have two??? Where??? Anyway, If money is tight, check a salvage yard. Most guarentee their parts for 7-30 days. Way, Way cheaper than buying new.