Does all this Maintenance seem necessary Fuel injectors coil packs control valve?
If it ain't broke, don't fix it. Replacing all of the above described items certainly seems like it would prevent the possibility of them failing at some point in the future, but if they're all working, why replace them. I was still running on the original injectors, coil pack and control valves on my American built vehicle with over 150,000 miles when I traded it in for a new car. It sounds like a dealer is trying to milk you for whatever they can get. However, maybe they know something that the rest of us don't; maybe those parts tend to fail on that particular vehicle. Either way, I don't think I'd replace all of those parts as routine maintenance.