Bought 16 Accent in December with 16k on it. Now at 18k. About a month in I was driving to work & the Emergency brake light, ABS light, and esc light came on while driving & speedometer went to 0. I pulled over and killed the car. Everything went back to working. It then did it again a couple days later, and I called the dealer. Took it to the dealer & they cleaned wheel sensors & looked it over. Told me to bring it back if it did it again. They didn't really seem to treat it seriously. Which didn't sit well with me since I took off work to get it taken care of. About a week later I started the car to let it sit idle & defrost windows. Came back out to the car & all three lights were back on. Speedometer didn't work again. I called dealer, and drove it straight there. Left the car running until service manager could get in it so they could see what it is doing & get codes. He drove it in and the dealership had it for three days. Made up story about how the speedometer started working when he drove it into garage even though I drove 20 miles and it didn't work. They told me they once again cleaned the sensors & disconnected the brain from the fuse block. Started doing it again not long after. I pull over and called Hyundai directly. Open up a case, and get recommended to a different dealer. Car has been sitting there since Friday with them being unable to diagnose the issue. Car has been at a dealership off and on for probably a week & three different trips since I've owned it since December, and nobody can figure out why this is occurring. I've read where wheel sensors or brake switches can cause this issue. The Hyundai support person I'm assigned to has a voicemail that is full & is incognito. The lower level support minions keep paging her but getting nowhere. Anyone have any ideas or ran into a similar situation on an Accent or any other Hyundai vehicle? It's done it while in park & not driving. It's done it while I'm driving it. I've driven directly to dealer while it's doing it. We are getting close to lemon law status. I went with Hyundai after excellent experience with our Santa Fe. But it appears this one is a dud. Great car other wise if anyone could figure out what's wrong.