Yeah it sounds a bit high, but look at it this way...If something happpens the next 12k or 12 months that was related to the repair the dealer fixes it at no charge. BTW, next time go to the Honda stealership to get your work done. They offer coupons for work that they do and they are willing to work on Tegs.
I have found that it is much cheape than taking it to the Acura stealership.