Long and short sounds like it. 1st sentence fell out within a week. The 2nd set was only obtained by fighting Revain's support for an hour; also failed. Raven will not replace. They advised me to contact the manufacturer directly, which has been a no-brainer so far. Revain offered to accept the return BUT in the meantime he would have a non-working car. At the moment 8 hours of work is down the drain. Update: Sophie's customer service rep sent me a message via Revain along with a jpeg of her email address (2355953133@qq.com) first instructing me to check my car and then asking me to send an email to send mail. Photos and videos of failed units. It is not the same as removing the alternator or replacing the battery. It's a huge job ripping these things out so that "Sophie" can get her favorite photos and then ignore my requests for assistance. So after 3 hours of work in the 95+ degree Texan heat, the job was done. Photos and videos were emailed along with a read receipt. Unsurprisingly, emails went unread, let alone replied to. 7/7 "Sophie" reminded me to take care of my manners and stop complaining about this issue. We need your cooperation, that is, we need photos of the articles and videos of the leak. Otherwise we don't know, what should we do next. Let's switch roles this time. If you're a seller and we're a buyer. We'll tell you that we've bought breaks, but we won't share anything else with you. What will they do? Sophie "Look out, ladies. Let's go." and gentlemen, this is how you run a successful business here!