[onewhippedpuppy]

At what point is it a monopoly? Modern cars are incredibly complex with proprietary computer systems, just the diagnostic computers are thousands of dollars. Many modern systems require connection of the diagnostic computer to reset the system after the replacement of a component or an adjustment. Run all of the lower priced independent shops out of business and the already overpriced dealerships can charge whatever they want. It's a very valid concern, at least for buyers of new cars. Sometimes I'm ok with my old Land Rover with its OHV Buick V8, and at times think I may always own a car from this era. DIY with a modern car just isn't possible.