Oh man this is the number one most nieve question to ask, but I’ll give you the scoop. Any aftermarket part has the possibility to void warranty. Any aftermarket part can void warranty when and only when it is proved to have caused the problem. A lot of people always ask, “will these mods void warranty,” and I always say, maybe. Any aftermarket part usually won’t cause any problems. A dealer will see any after market parts you do to the car. Some people have dealers that don’t care, others have gotten lucky because dealers don’t look at it. If you’re just going in for simple oil change, they won’t care, but any major repair they put everything under a microscope. If you’re worried about warranty, don’t modify, if you are willing to take the risk, you won’t ever look back. Keep in mind, If you have problems with your car, they’re going to come up with or without any aftermarket part. If you decide to go down the rabbit hole, here’s my modding guide:
https://www.explorerst.org/threads/explorer-st-modding-101-guide.7324/