You are infringing on their Trademark, and even though there may be others in the industry who do the same, the problem is that this is such a blatant infringement that you could never really have any success without fear of having your name taken, being sued, or put out of business. I know that there are Apple/IFon/IPod type sites that are allowed to run wild out there because it is good for Apple in most cases to have that interest, but in this case, Honda makes a ton of money selling auto parts so you would be directly competing with them.
There is no gray area here. Honda can only mean one thing. If you are going to infringe, it is best to use a name with multiple uses, so that you can at least have a plausible good-faith defense. Not taking a moral stand here, because it is a slippery slope. There are certainly names out there that many of us would never think of registering without first thinking of the Trademark associated with the name, yet because the name has multiple uses it would be a valuable name. Something like AppleForum.com would be an example, though I am not so sure that a site talking about Apple computer would really be infringement, but you get the point.
A few years ago I registered a few names like iPodProblems.com and iPhoneTroubles.com (something like that). They got a bit of traffic and someone else has them now. Those names have value to someone who has online business dealing in those products, and most are licensed dealers for Apple. So, there may be examples like this where there is technically infringment, but where everybody wins, including the ones being infringed upon. But it is a slippery slope and it is best to really understand all of the moral and legal issues before jumping in (so you can be ethical and also to protect yourself). By positng this name in an appraisal thread I think you probably need to do some more reading, because you just made a mistake and unnecessary footprint.
The great news is that I think you probably have good intentions, or else you would have never posted the name. Intentions count for a lot when it comes to what is right and wrong. People can make innocent mistakes.
