Carfax report gives the information that has been reported by shops, especially in Mass where mandatory reporting for all shops is required. However, since, like myself, many times a owner will service his own vehicle, etc. it wont be on the records. So as far as the odometer, insurance reported accidents, etc. Carfax is a reliable source of information to help in deciding on purchasing a car. The next evolution of Carfax might be to include car specific maintenance or known issues as part of the report. For example, the 2006 jetat tdi 1.9l DSG auto 186K that I purchased, did not have a flywheel rattle that would indicate need to replacement. After I purchased the car, the same day, I found a loud rattle, metal banging sound which indicates a urgency to replace the flywheel. While Carfax cannot predict flywheel replacement, my research has found that at the mileage I bought the mileage would warrant a flywheel inspection simply because of mileage. Even though I asked the seller about the flywheel, he gave me inaccurate information such as flywheels are noisy (this might apply to Single Mass Flywheel, manuals which do not dampen the engines vibrations as much as the Dual Mass Flywheel which the DSG has), but do not worry about it if it happens to you. These little details in the negotiations would go a long way to helping the purchasing with certain years, makes and models to alert them to do research for this possibility and ask for a better selling price. I would have asked for a lower price, knowing that I would have to replace the flywheel soon verse "its no big deal, all flywheels are noisey" So the Jetta I purchased two months ago is in shop for the flywheel to be replaced. Fortunately, because the DSG auto uses a wet clutch, the clutch should outlive the flywheel. Stuff like that would really make Carfax standout as the go to place for records and search. The only places to find out known problems and solutions to repairs is to search specific car make/model forums. Even a website like Edmunds which gives an expert review, user reviews an a used car estimate of value. Having this information published would help buyers since sellers in order to sell their cars with know problems would need to adjust their price. Just because a car does not have a problem, specific parts only last so long. Even asking when the last timing belt change on certain cars, for me, is valid since it is usually $1,000 and that is a consideration in the price of post-purchase investment (tires, oil, filter, water pump, etc.) These are my reflections. Also, Mass does have a lemon law which requires the car to be able to pass inspection at time of purchase which this car would not because the tires were borderline, the windshield recently cracked, DTC light airbag sensor -although easy to replace- any DTC for car safety devices need be replace before inspection. The process as I found out later is: purchase, register car, inspect car - fail inspection buyer is entitled to full refund - provide links to different states Lemon law webpages. Things like this would add so much to helping the buyer. Carfax began as a Title, odometer and accident/salvage checker. So to progress to expanding your car centric information ecosystem to include more and certain relevant information would be great. Even having a sorter where by, some is looking for a certain car say for example in my case a tall person car. Jetta, new style 2006 not 2005-previous would be great; then if I am primary purpose is driving myself done, if I want to travel with adults in the backseat as a tall person, the driver backseat is useless. Stuff like that is great. 2005 Honda Odyssey I fit, most other mini vans of certain years, makes and models I do not fit. Leg fitment by inseam and even clearance under steering wheel. Or those tall person's who have tall torso need more headroom, ets. Serious help. Well, those are my thoughts.