Benefits of OEM car seats include surety that the replacement car seats match the original car seats, assurance of getting an equally good quality seat as the original ones and getting car seats that are made to fit. OEM stands for Original Equipment Manufacturer.
When car seats need repair or replacement parts, it is possible to use OEM parts from certain manufacturers. This simply means that the replacement car parts are manufactured by the same manufacturer that produced the original parts of the car. Perhaps the greatest advantage of OEM car seats is getting a replacement that is made to fit so that all bolts, nuts and rails fit as intended.