I was curioius. Does your 96 have more than 150,000 miles on it? Your car has a 14 year- 150,000 mile emission extension warranty to it. O2 sensors are a covered item and you wouldnt have had to pay a nickle for the repair at the Acura dealer. All 95-97 nsx have this extended warranty. I was the NSX mechanic at Tonkin and left to start my own shop but if my NSX customers still have a emission failure I send them to the dealer to get it covered for free. Hope this might help in the future. David Brock