In my opinion, it is an interesting domain that may have potential in the future, as hybrid cars get produced in mass. However, you may have to pay a couple years worth or registration fees to capitalize on the opportunity for selling beyond the currented estimated wholesale valuation. The other thing that is nice about the domain is that it is a DOT com and is two words in length. In my opinion the domain woud probably go from the low $XX to high $XX at the wholesale level today. Tough call. Good luck to you.
Unless a new breaking system developes and you can make a hybrid out of them then I don't see the benifit of hybrid breaks.com. Sorry. Its not too bad if you can think of some market for it, but as two words I can not see them together.