Four problems related to engine rattling and whining sounds have been reported for the 2015 Hyundai Sonata. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2015 Hyundai Sonata based on all problems reported for the 2015 Sonata.
I was driving on the highway and heard a rattling sound on the engine then the car turned off. I had it towed 53 miles to the dealership and they told me the car needs a new engine and that they were going to send a request to Hyundai for the engine. They said it would take a couple of days to find out what they say.
To note vehicle had a complete evaluation 1 week prior with no current or upcoming issues. Upon starting car "abs light, traction light, bsd (blind side detection) light" came on. Upon driving, my bsd sensors did not operate, and engine made whistling sound upon acceleration and would not go over 40mph without the power being pulled from the engine. Also to note my car was apparently trying to be in a higher gear at 30mph (5th gear). All of this is very suspicious as the car has only been serviced at dealerships with most recent being 1 week prior. Service department seemed very poor at explaining the cause for the simultaneous malfunctions of all these systems. I do not currently feel as safe with this vehicle as I have before.
Problems started with rattling noise from engine, and engine loosing power/surging. This was 2 years ago with 20,000 miles on car, and took to dealer who applied ecm update. Which if anything made it worse, and car started surging forward in situations like applying brakes when approaching red light. This has caused me to nearly rear end several cars, and pushed me out in traffic when engine surges unexpectedly. I have made several trips to the dealership, like many others always get the same answer �we were unable to reproduce issue�, and even went to another dealership to receive same answer. Car still has same problem, it happens frequently, and also happens when I have had friends with me or drive the car. So I'm not crazy, not doing anything wrong, and believe hyaundai is trying to wait for power train warranty to expire. Since I travel for work and now have 94,000 miles on the 2015 Sonata sport.
The contact owns a 2015 Hyundai Sonata. The contact stated that while driving, he heard a rattling noise under the hood. The contact stated also mentioned while taking the vehicle to be serviced for an oil change, the rattling noise began to make a loud knocking noise. The check engine warning light illuminated. The contact mentioned that the independent mechanic informed him that he should not drive the vehicle and that he needed to have the engine checked. The vehicle was then taken to dave hallman Hyundai at 2104 state st, erie, PA 16503, (814) 452-6731 where it was diagnosed that there was an oil sludge build-up and that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure but did not offer any further assistance. The failure mileage was 56,150.