1: I am a business major, who has basic knowledge of programming and an interest in technology and how it affects the world. One thing that I think technology should do is allow people to access to more accurate information. For a few years I was a projectionist at a movie theater and one of the things I needed to be capable of doing is identifying problems and judging whether I could fix them and how long it would take. For me, it is a point of pride to be able to fix things and the lack of transparency in my car bothers me. I think that a business based on working around those limitations would be a good fit because it is something that I would be very motivated to constantly improve, because I would use it.
2: I am offering customer more complete information about their cars. My idea, a phone app, that connects to a car through bluetooth, to read error codes and give engine status'. This would give detailed information to the end user that they would otherwise only be able to get from a mechanic. This can help guard against unnecessary repairs or from a a serious problem going unattended due to the driver assuming it is something less serious. I'm offering to save customers money, and give them a better idea of their car's health.

3: I've said what I'm offering to the end user of this app, but it would actually have to marketed to car manufacturers. For the app to work there must an addition to the cars on-board computer to function, so marketing to them would be the easiest way to implement this. As businesses, car manufacturers are always looking for a leg up on their competition, and that's what I'm offering them, a feature that can then be marketed to their customers. They are the ones I would would be selling to, but to the end user this is a free feature that comes with the car. Just like the bluetooth, that I would use to connect to the car, or keyless entry, once it starts being offered, other companies will have to adopt it as well, or be left behind. For the manufacturers that adopt early, I'm offering a potential sales boost. For the later adopters I'm offering the competitiveness that they need to survive.
4: As I've said above, I would actually organize my business to sell to manufacturers, and not to the end user. Manufacturers would pay, because they believe it is something that their customers would want. I believe that drivers will want this. People are busy, and their cars are a big part of their day to day lives. An app that lets a person know what kind of gas mileage they are getting, gives them a reminder when they need an oil change, or tells them there is a problem with their car and how serious it may be, will help them.
5: I am not a mechanic, and I am not software or hardware engineer. I have a basic understanding of all of these things, along with experience in managing people though. That, I believe, would allow me to work with people who do have those abilities, and understand what the limits of what can be done and any issues that present themselves. As I mentioned about, it was very important as a projectionist that I be able to identify and evaluate problems, and which is also a major component is managing a business. If you cannot correctly evaluate an issue, then you will have a hard time correcting it. I think that I am someone who has the ability to do that, which not everyone does. That ability combined with a product that people want can go a long way towards a successful business.
In my opinion the biggest hurdle this business would have to face is getting the product into a major car brand. I think the concept is solid, but it's not something that many people who don't work on cars would put in the effort to buy and install on their own. If they did want to install it on their own, bluetooth transmitters are generally part of a cars stereo system, so extra connections would have to be made with that system. That extra complexity makes it harder to sell the system as a stand alone system very difficult, and is why I believe sales have to be directed toward automakers as opposed to the actual end users.