Wife's NSX had the same problem. It was the release lever.
The lever would turn but not turn the release rod.
Lever was stripped on the inside. Bought a new one from Acura, 25.00, pulled the old one off and pushed the new one on, no big deal and works perfectly.
Call Peoria Acura, they will give you 25% off list prices for OEM parts.
Something I recently set up. Ask for Lance or Lee. Tell them your were referred from the NSX Time Attack.
>>Acura of Peoria (AZ) is a proud sponsor of NSX Time Attack! For all your OEM NSX needs, please visit us at
www.OemAcuraParts.com. We are proud to offer NSX owners a 25% discount on all original manufactured parts and accessories that are available from American Honda/Acura.
If our NSX catalog is not working properly or you have any questions, please call us toll free at 1-866-347-4510 and ask for Lance or Lee!
We can ship anywhere at reasonable rates.
http://nsxtimeattack.com/sponsors