I purchased a vehicle in 2017 (it was model year 2017 as well). The Carfax was clean and touted by the dealer, Car Gurus etc. 9 months after I purchased the car, an accident shows on the report, which now invalidates my manufacturer warranty, so now I am out $3800 for repairs. From CarFax - "Therefore, we cannot guarantee to report all accidents and damages. CARFAX always recommends the CARFAX Report is used along with a pre-purchase vehicle inspection and thorough test drive to check for prior repairs, hidden damage, and anything that might not have been reported to CARFAX." Basically, if it is not reported, you are out of luck and they bear no responsibility. Great business model - “Hey buy this car because it has a clean carfax (as far as we know) and if it does not, then you are responsible." Never again will I pay for or rely on their reports because they are not much better than best guesses.