I was also not sure about the wording [Owner's Manual] in the original post.
1. If you are after the [Workshop/Service Manual] like this,
then, you can get in touch with any Honda dealership in Europe or Japan.
There is no specific manual just for 2003 model so you have to buy the original version (very thick, like phone book) + about 6 additonal booklet for the new/modified section. It's going to be heavy so if you are based in US or outside of Europe/Japan, then it would be best to try one of the auction site at your region to get hold of them....
Most of the information can be shared with Acura version though...
2. If you are after the [Owner's Manual] Booklet that comes with the new car
thx Kaz...I want to buy the japan version to have as a keepsake do you know a partnumber or where I could buy?
thx
and if you are happy with the one from Honda Japan (as you stated), then you can download it from the following link;
http://www.honda.co.jp/manual/nsx/20...04-nsx-all.pdf
It's in Japanese but just looking at the diagrams would provide you with some information.
3. If you are after the [Owner's Manual] Video like this,
then please try Honda Japan directly. It came with my NSX when I bought it in 1994. Video is in NTSC format so should be fine for US.
Regards,
Kaz