how many o2 sensors are on a 95 boneville se?

I think one in the rear manifold.

Yes...one by the #4 spark plug at the firewall.....

yep, just one in the middle of the rear manifold, 95 was the last year before they put one after the cat on the obd2 cars

Interesting. I just had the 02 sensor replaced about 2 weeks ago. My check ses light came on a couple of days ago and the dealer told me it was the 02 sensor. When I told them they had just replaced it, he stated "your car has two 02 sensors". I have a 92 se. Do I have two 02 sensors?

You mean an 02, not a 92, right?

A 92 has 1. An 02 has 2. One will trigger a SES code, the other will trigger only emissions.

They didn't go to the 2 sensor system until about 96 I believe....Your dealer is smokin' tha ganja

96 is correct, sir.

I have a 92 se. The dealer just told me he replaced the second O2 sensor. They replaced the first one 3 weeks ago.... go figure... i just wish they would call me in the morning and tell me I'm the only one

Update your sig, and make sure we know which car

If they were talking about replacing the same sensor TWICE, ask them why. If they changed BOTH, ask them "HOW?"